There's a lot to cover, so let's start with the features and upgrades Casio has made to the PRW2500T to previous watches. This is Casio's latest (2001) edition of their Pathfinder Tough Triple-Sensor Atomic Solar watches - which is a real mouthful. Basically this series of Pathfinder watches really are the Crem della crem of those offered, as they include a tough design to resist damage & wear, includes some form of significant water resistance (20BAR, 200 meters), has a triple sensor (temperature barometer, altimeter, and digital compass), has an atomic timekeeping feature, and is solar powered. In short, this watch is extremely feature rich - but this is nothing new for Casio. The PAW1300T I mentioned earlier came out about four years previously and has the exact same features - save for a weaker water resistance (10BAR / 100 Meters), so Casio is certainly staying the course in offering what its most outgoing and resourceful customers want. What this watch DOES offer as an upgrade significantly is new moon and tide data, which the aforementioned watch did not have - so this is something to consider if this is what you're looking for.
What makes this watch such an effective upgrade is the great display redesign that it has given compared to previous pathfinders. the PRW2500T, from the home screen, allows you to view the moon phase, day of week, barometer graph, tide chart, date, and time without pressing a button! That's a big upgrade, as previous watches required you to trade the day of the week for a barometer graph or other exchanges of information, making it more inconvenient for the quick glance. Of course, as a cost the time display is much smaller, so you'll have to look harder for this view. The watch's physical design has also gotten a serious upgrade, with resin supports around the stainless steel casing to ensure less denting and help maintain a water-resistant seal when possible. The band also connects to the watch face much more securely compared to the PAW1300T, meaning your band won't break as easily (which is why I ended up buying this watch in the first place!) and you're not going to have to replace the band as likely. Long story short, the watch has been built much better compared to the PAW1300T and is a step in the right direction for Casio
The sensors and general timekeeping are solid. Atomic timekeeping is a pain in the butt, and i have to say I've yet to get a solid update unfortunately, but bear in mind this was done in a metropolitan environment on the 4th floor, not a rural one away from buildings where it's mostly expected. Then again this is nothing different from past pathfinder watches, which
The watch has everything you need, and only a few shortfalls. The titanium band - while strong and lightweight - is not very scratch resistant. The paint on the surface (such as on the direction dial) is also very prone to scratches, which really kill the clean and finished look I just loved when I got it. I'm a week in and it's already chipping paint and scratching up, and I've yet to take it on my first hike. Despite this, it's extremely resistant to wear and will last you years - so long as you give it the maintenance it needs every so often and keep it away from harm. It's no G-Shock, but a very good watch, and light on the hand!
The titanium band is a great option that's very classy and resistant to damage - but where the watch face and band meet is connected by metal and plastic/rubber resin - which has in the past broke on my other pathfinders. The new design is much more beefy and resistant to damage, but I still feel Casio has a conspiracy to sell you titanium bands that break and get scratched up, especially when they only offer a 1 year warranty.
Speaking of warranties, this thing - for what you pay - deserves a 3 or 5 year warranty. Casio's 1-year warranty is an insult, and they should really back their watches more long-term. The watch face will probably outlive you - but the watchbands are very likely to break every few years. The titanium band is an easy $70 to replace, so keep that in mind!
In the end there's a lot to be said about this watch - most importantly it will suit your needs no matter your interests, whether they be personal, business, or military. I also feel I've barely scratched the surface with this watch, so please feel free to individually ask questions if you feel this review isn't sufficient of how much this watch covers. This is a watch that will go with and last just about anything you throw at it. I love it, even despite its shortfalls, and think the pathfinder is the most feature-rich watch money can buy.
UPDATE - May 15 2013
Nothing has changed for this watch except some wearing on the compass dial. Apparently the paint can't survive, though everything else is in fair order. I don't get why this feature is even on the watch but nonetheless it does hurt the aesthetics. Bear this in mind as you use it! Regardless it's still a fine product and everything else seems to be working great.
UPDATE - July 2014
Just a short update. I ended up shelving this watch for a bit as I use my smartwatch more often. My only disappointment is that the device doesn't store its charge for as long as my previous Casio (in fact this one is dead while the other Casio is sitting on Low after over a year!) which was a little surprising, but not a deal breaker.
Nonetheless the unit is holding up fantastically even before I switched to a smart watch. I definitely will keep it around for the more outdoor days.