Summary: I bought one for my wife and put 1700 pictures on a USB. A 10 inch screen was the size needed to really see our pictures of Rome etc. I could not get the USB to work properly, so I switched to a 4 GB SD just like the one from the camera and it worked well enough for me to buy 3 more as Christmas gifts.
Summary: Once you find your way around the remote control (using the keys on the back of the frame is not convenient), the product works as expected. Howewever, (and I'm at age 83 and pretty well versed in matters of new technologies) going through steps to find directories and pictures gave me a hard time and the printed manual was no help at all; it just contains a hartd copy of what can be found on the screen.
Summary: Once upon a time Viewsonic made great monitors, which is why I decided to choose this brand. This frame turns out pretty pathetic. Three big problems with this product. Color accuracy is poor, skin is always reddish. All pictures come out a bit stretched horizontally (no I'm not using the stretch to fit option). If you're a photographer, you would hate these 2 things for sure.