Ok, to those who have written bad reviews about Coby frames (specifically the 7 inch frame).. either you didn't know what to buy properly or you didn't have a reasonable idea of what to expect for the money.
Let me start off by saying that the frame is wonderful, it looks crisp, bright, and sharp. The pictures are not one bit blurry and all of my pictures that are horizonal shots fill the up frame entirely (read below). The only negative thing I would point out, is that the stand for the frame doesn't appear to be super-strong and will probably give out at some point. That, right now, would be the only thing I would change.
Let me describe 2 things:
1) When buying a digital frame, expect to have black bars on the top (or bottom) and sides of the picture unless you match your camera's resolution to the frame. My camera (a Nikon) takes photos in 800 x 600. So, I was going to buy the 7 inch frame, but noticed the resolution was not in the same aspect ratio (4:3). Therefore, I went with the 8 inch frame, which yes.. was significantly more (same price as the 10 inch frame - which I also didn't go with due to the resolutions not matching). I have not been disappointed one bit. Using FastStone Photo Resizer, I selected all my images from my camera, including my wedding photos (which are not quite 4:3) and resized them as new files to 800 x 600 (retaining my original files in their original format of course). This displays every picture in the full frame, as long as it is horizontally taken by the photographer. Bottom line = buy a frame that matches the majority of your pictures' aspect ratios and you will not be disappointed. Sidenote: I put over 500 pictures on the frame with just a 128 MB card after they were resized - talk about easy! 128 MB cards are a matter of dollars now.
2) Something no reviews for any of the Coby products have talked about yet... the Slideshow and other setup options available. For slideshow, you have several different effects that can be used, and you also can randomize the photos during slideshow. Of course, time between each picture is also an option. This was important to me because I didn't want the frame starting at the same spot after everytime I turned it off, and not being able to randomly go through pictures. Some frames don't have this option, but this 8 inch Coby frame DOES and I assume the others would too (but don't know for sure, no one has written that they do in their reviews).
Overall, there seem to be plenty of options, for a cheaper frame, it has the best resolution for the price (800 x 600), plays music and video (both of which I have NOT tested yet - more later), has 2 frames (black and white), and looks great!
Don't let people dissuade you from purchasing this frame (and I would assume other Coby frames as well). Just make sure you understand formatting pictures; you have to match your pictures to the resolution of the frame. IF you buy a frame that is 840 x 480 - take a current picture you have on your computer and resize it to those dimensions and see how much of the picture is lost.. is it stretched to where it looks funny or odd? Then that is the wrong frame for you. Don't buy the cheapest frame and expect every picture to fit exactly right. This frame above is 800 x 600 (4:3 aspect ratio) and my camera takes 4:3 so it worked wonderfully for me! I couldn't be happier for the price.
Sorry this is so long, but I wanted to hit on some points I was worried about when I bought it, so now others don't have to worry about the same points I did.