Pros:
Camera: Picture quality of the 3.2 megapixel autofocus camera is remarkably good (up to 1600x1200 pixels), the low resolution video camera not so much (video resolution is only 320x240 pixels and playback is rough and jerky) . Photographs are automatically geotagged and can be attached to your notes for the geocache. The photographs and videos can also be viewed on the internal picture viewer.
Microphone: There is a microphone and speaker for voice annotation so you can record spoken notes in the field. These notes can also be attached to a geocache.
Feel: Feels good in my hand, solid and substantial. The large loop at the bottom is perfect for attaching a lanyard (although no lanyard is supplied).
Construction: The 710 seems very well-built mechanically, with O-rings to seal it against water intrusion. It is waterproof to IPX-7 specifications. The speaker, microphone and camera lens are all outside the sealed area, but I assume they are waterproofed some way.
Receiver: The SiRFstarIII(tm) based receiver locks in solidly and holds lock even indoors and in heavy tree cover and "concrete canyons" in the city. The accuracy and position jump around some when you don't have a clear view of the sky, but it seldom loses lock.
Memory: 8GB of memory is included, and there is a card slot for microSD cards up to 36GB. 8GB is a LOT of standard memory for a GPS!
Maps: Turn-by-turn navigation works very well, and the excellent Summit series USA topographical and City series USA turn-by-turn navigation maps with voice guidance are included in addition to the World Edition basemap.
Batteries: Comes with a pair of expensive, long lasting Eveready Ultimate Lithium batteries. Other brands usually don't come with any batteries at all. There is also a coupon included that gets you $2.00 off on a set of Eveready Ultimate Lithiums.
Altimeter: After calibration to my home elevation, the barometric altimeter seems to stay calibrated well.
Customizable hard buttons: You can assign frequently used functions to the two buttons on the side of the unit for easy access.
Display: The high resolution display excellent indoors or in shade when backlight is on, but it's another story in bright or hazy sunlight. See below.
Batteries: has settings for Lithium, Alkaline, and Rechargeable batteries
"Four CornerTM" menu: works well and is easy to get used to. Tapping the center of the screen once brings up the Four Corner menu. The upper left corner defaults to a "Dashboard" screen that has a compass display and 8 data fields. Each of the data fields can be customized to show the data you want to see on that screen. You can also choose a conventional compass display, a "Road" display that gives a psuedo-3d display of the road ahead like a car GPS, a rotating strip-style compass, a satellite display, a barometer display, an altimeter display, a display filled with data fields only, and a profile display. Tapping the upper right corner brings up the "One Touch" menu (see below). The lower left corner gets you the main menu, and from the main menu you can choose any of the top level functions or go into a Settings sub-menu to tweak the 710 to just how you like it. The lower right corner always gets you a context-sensitive scrolling menu that changes according to what function you are using at the moment.
"Dashboard" screen: is useful and easily customizable (see above).
"One TouchTM" Menu: This is a nice idea, but won't allow me to do some things I would like to have on "one touch" basis (for instance "Cancel Route").
Paperless geocaching: Excellent ... contains all the info you might need including pictures that appear in the cache description on geocaching.com. It does NOT include the gallery pictures though. This unit comes with a certificate good for a 30 day Premium membership at geocaching.com.
Support: The guys in the "Magellan Insider" group are super-helpful unpaid volunteers. The Magellan Product Manager for this product is very helpful and takes a personal interest in customer problems.
Cons:
Display: High resolution displays don't work well in bright sunlight and this one is just as bad or worse than the Garmin Colorado and Oregon displays. If you hold it at just the right angle to the sun you can read it easily, but at most angles it is so dark as to be unreadable. This makes it particularly bad for use in a fixed mount on a bicycle, where you will almost never be able to read it. It also has a strange interaction with polarized sunglasses that causes the whole display to appear in shades of gold. Anything white on the screen (including the white on black text during boot) shows as gold through polarized sunglasses. This makes it even more difficult to read than the Garmin hi-res screens which do not have this strange interaction with polarized sunglasses. The backlight helps, and it comes on when you tap the screen, but the backlight is also a major consumer of electrical power and the more it is on, the shorter battery life is.
Touch screen: Sometimes it is somewhat unresponsive, and scrolling through long menus (there are many) can be difficult to do without inadvertently selecting something. Later versions of the firmware have addressed this to some extent by adding up/down arrows at the bottom, but not all long menus have them yet. There are no slick features like multitouch as found on Apple touch screens.
System boot: It takes quite a while to boot up (about 1 minute) and acquire satellite lock. However, once it gets a lock, it seems to hold it well. Unfortunately, periodically the unit will announce it is "restarting to improve performance", and you get to watch it go through the reboot procedure again, and afterward it doesn't seem to have improved performance at all. It did that on mine five times in one morning geocaching session.
Route calculation: At least on my unit running the latest firmware (4.83 at the time of this writing), calculating routes can take ridiculous amounts of time. One day I was 1.5 blocks and one right angle turn away from a geocache when it decided it needed to recalculate the route. It took three minutes to recalculate the route. This was in an open area, clear view of the sky in all directions, all bars lit up on the satellite display and the dashboard indicating "excellent" for signal strength. It often takes a really long time to calculate routes, sometimes I have had to power-cycle it and when it comes back up it finishes calculating the route immediately. These delays in route calculation happen annoyingly often.
Keyboard: This is an incredibly poorly-designed implementation of a touch screen keyboard. They have split it into two screens for the alphabet and you have to keep going back and forth. Even if the word you are spelling is all on the second page, there is no spacebar on the second page so you have to go back to the first page to get a space, or to capitalize a letter. It is by far the worst keyboard I have ever seen on a handheld device. Hopefully they can fix this in the firmware. Apple's iPhone and iPod Touch have the keyboard Magellan ought to be emulating.
Battery consumption: This thing loves to chew its way through AA cells. They advertise 16 hours, but I can only see it doing this if the unit is turned off. 2700mAh Powerex NiMH cells are good for maybe 3-4 hours. Non-rechargeable (and expensive) Lithiums maybe 8. You can extend battery life by setting it to time out and go into a mode where GPS tracking continues but the display goes off, and you awaken it with a tap of the power button. This helps a lot, but every time it comes awake from this mode the compass needs to be recalibrated, which is pretty annoying.
Compass: The compass needs to be recalibrated frequently. According to the manual, to do it, you dig down into the setup menu and choose "calibrate compass", and it displays a diagram of a figure 8 pattern they want you to move the unit through while rotating your wrist so the unit is upside up part of the way and upside down part of the way. I do that, waving it around like an idiot for five or ten seconds and then it tells me "calibration failed, please try again". Sometimes I go through four or five iterations of this before it says "calibration successful", only to have it go out of calibration again in a few minutes. I have learned through the eXplorist user forum that you don't actually have to go to the calibration screen to do this, you can just look at the little red compass calibration indicator at the top of each screen and wave it around if it is red (it turns gold when it is in calibration), but you still have to do this very, very frequently. On the numerous Garmin units I have had, one calibration of the compass lasts until you either power it off and back on or change the batteries. This is surely a bug that needs to be fixed.
Menu system: Although the "four corners" menu system is a nice start, too many commonly used functions are buried too many clicks deep and on long scrolling lists that have no easy way to navigate them. For instance, if you are geocaching and decide to cancel your hunt for the current one, you have to tap the center of the screen to bring up the four corner menu, then tap the lower right to bring up the context menu, then scroll down carefully several screens while being careful not to accidentally select something (if you do, you'll have to start the process all over again) before you get to the "cancel route" choice, and then you have to confirm with one more press that is what you really want to do.
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