This is my second all-in-one printer, and my first wireless printer. It is a great unit, but it does have a few drawbacks that either will annoy you or won't bother you. Note that my computer experience below is with a PC with Windows Vista, my mobile experience is with an Android tablet.
First off, it seems like a standard size printer to me. I guess my old printer must be fairly small as well, because this Epson is pretty much the same size. I see from other reviews that it is much smaller if you compare it to giant full-size printers.
Setup is a breeze. Just follow the included instruction card and it really couldn't be easier. The entire unit is just one big piece, no tray assembly required, and installation of the four ink cartridges is easy. The wifi connection can be set up either directly through wifi or by plugging a USB cable into your computer. Their recommendation is to go the USB route, but really, it's very easy to do it just through the printer. It detects all the wireless networks around you, and you just choose which one you want through the optical screen on the printer and directly put in the password and that's it. If you use the USB cable, it uses just a standard printer-style USB cable, so if this is replacing an existing wired printer you should already have a cable for it. After the wifi setup just install the software on your computer (all computers that will be using it) and you're good to go; the computer should then detect the printer and be able to start printing to it. There is a firmware update available for the printer already, and it'll automatically prompt you during the computer setup to check, download, and install. The printer can accommodate paper from 4x6 to 8.5x14.
Printing from your computer is easy. Again, once you have the software installed it should automatically detect the printer and start printing to it (or allow you to select it if you haven't selected a default and still have your old printer). One thing I have noticed that is annoying is that you can't do two-sided printing over wifi. I'm not sure why, but it just doesn't work. It actually gives you a message that two-sided printing may not work over wifi if you try it. Annoying for me because I'd rather save paper. Overall print quality is fairly good. The colors are a bit muted and on some tests that I've done they've alternately come out pretty clear or I've been able to pick out the dots in the printout pretty easily with my naked eye.
Printing from an SD card is fairly easy. Just put the SD card into the slot and it is automatically detected (be sure not to push it in all the way; it only goes about halfway in). You can then scroll through your photos, choose the paper type, change the number of copies, and even crop the printouts right from the LCD screen. If you have a large SD card, you can go to the settings screen on the printer and choose to select photos by date. It'll then organize them by date and you can quickly scroll through the dates to find what you're looking for.
Copying is easy from the scanning screen. You can copy in color or B&W. The settings on the LCD screen allow you to change the contrast, printing ratio, paper type, paper quality, etc. I've noticed that even when set to "actual size" the copies get scaled down slightly.
Scanning is a mixed bag. There are several scanning options, including Scan to Memory Card, Scan to PC [saves as a JPEG], Scan to PC (PDF), Scan to PC (Email), and To PC (WSD) [supposed to let you manage wireless printing]. Scanning to a memory card is easy; just select the format (jpeg or pdf), the scan size, etc. The printer will create a new folder on the SD card (EPSCAN) and save the file in there. Easy! Unfortunately, you cannot scan over wifi from the printer. Really? Yes. You are supposed to be able to, but it just doesn't work. It gives a "communication error" if you try any of the "Scan to PC" options or tells you that no computer could be found if you try the WSD one. Note that this is right after printing wirelessly just fine. However, not ALL is lost. There is a workaround if you have a PC available (which you should if you're trying to scan to PC). Just open the Epson Scan software on your computer and tell it to scan and this actually works just fine. From the Epson Scan software you can save the scan as a bitmap, jpeg, pdf, or tiff. If you have the USB cord plugged in then it'll work just fine from the printer. Note that if you scan to PC for email it'll open up the Windows email setup wizard if you haven't done that before. In my case I access all my email from my internet browser so I don't use Windows' email function and this doesn't apply to me. I found that scans alternated between getting the correct colors and again giving me muted colors that didn't capture the vibrancy of the original photo. Other than that the scan quality is great.
The printer also has one more option to allow you to copy and/or restore photos. This is intended to allow you to take a photo and have the printer "restore" the colors in it, remove dust from the image, etc. It seems to default to regular photo paper sizes (i.e., 8x10, 4x6), so if you have something that is a bit off from those it will force you to crop it. You can put more than one photo on the screen if you want. If you do this from the printer you can automatically print right from the LCD screen. If you do it from the Epson Scan software it'll save the image to file first. The color restoration works very well with the right photos. In my case it took a faded baby picture of me and made the colors vibrant again. I tried "restoring" a photo that intentionally had a yellowish filter on it for effect and it came out not looking good at all. Again, use it on the right photos and in my experience it works well.
As a bonus, you can also print from your phone or tablet with the Epson iPrint software (available for Android or iOS). This software easily detects your printer and gives you a clear readout on your ink levels. From the main page you can print photos off your internal storage or SD card, access online storage, print from a web page, or scan. I could not get the photo print to work. It kept force closing on me every time I selected a photo album. The online storage allows you to access your Evernote, Dropbox, or Box.net accounts directly from within the iPrint app and select what to print from there. Printing from a web page opens up a browser within the iPrint app and you can just navigate to the webpage you want and tell it to print. It seems to scale down a bit; the same photo that I printed using Google Chrome's Cloud Print option printed out larger. The scanning function connects to your scanner and allows you to scan images directly to your device. From there you can save locally or to one of your online accounts, email right from the app, or reprint again. Saving to Dropbox automatically sync'd and I was able to instantly view the file on my computer. Sweet! Note that this printer is currently not natively supported by the PrinterShare app on Android. It will detect it, but it says it doesn't have the drivers for it. You can alternately select to print by way of the Google Cloud from within the PrinterShare app and this will detect and connect just fine and print it through the Cloud Print capability in Google Chrome.
Overall this is a great printer that is easy to set up and begin using. The only major drawbacks I found were that colors on printouts seemed a bit dark and in some cases the DPI seemed very low, it cannot do two-sided printing over wifi, it cannot scan to PC directly from the printer over wifi, and it doesn't seem to be able to always capture the right colors on the scans. If these don't sound like big deals to you then go ahead and buy it, it really is a great printer with great wireless capabilities (minus those mentioned above). If they do sound like a big deal then you may want to check out a different model and see if it works better for you.
Thanks for reading!