The praise for this digital picture in other reviews is well deserved. I produces clear, bright pictures. I bought one for my mother, to cycle through hundreds of family and travel photos, as reminders of these good times. In the end, I'm not sure I will give it to her. It could be more trouble to her than it's worth.
I've had quite a trial getting to this point. The first unit I received had a mechanical defect: the SD card slot would not latch the card without much fiddling. Amazon replaced the unit without question. My plan was to resize my 500-600 pictures to the resolution of the display so that they would fit nicely on an SD card. I put them on my freshly-formatted 1 GB card, and none of them appeared. After much fiddling--there is no information in the manual or on line--I discovered that the folder structure and file names have to match a supported camera. I aped my Canon file structure, down to file names like IMG_0001.jpg. Yes, the funny file names seem to be required.
Past this first hurdle, I put my 568 photos on the card and let 'er go. I found that after an hour or two, the screen just went blank. This was with a photo-change-rate of 2 per minute. I tried various experiments, with no luck. Sometimes, instead of a blank screen, the unit stopped the slide show in thumbnail mode and had to be restarted. I exchanged email with Philips customer service (after finding nothing at all useful on the web site other than the user manuals). They said I should phone.
I did, and spent 30 minutes with a pleasant but inexperienced rep who went through the manual and a little bit of additional guidance Philips gave her. She could tell me nothing, though she acknowledged the problem. She said I should return the unit. I persisted, and even though Philips has no escalation procedure for this product, we agreed I should talk to her supervisor. He was more technical, and very sympathetic. He confirmed the obvious technical things--how I'd downsized the files, that I was using .jpg format, etc. He said I was doing it all right. He too acknowledged my problem. He said to be sure I was not using a card larger than 1 GB, but 1 GB was OK. Don't use the CF card slot (I wasn't, though I tried it and had the same problem). He suggested I reduce the number of photos on the card, but had no other suggestion other than to return the unit.
I took about 80 photos off the card, so that the total was under 500, and it's been behaving OK for several days, switching photos at two per hour (change every 30 minutes). I don't trust the unit not to give my mom problems.
Bottom line: This is a great picture frame in terms of size and picture quality. It's easy enough to use (but not as easy as they claim). It works just fine with 55 or so pictures stored on its internal memory. But the problems I had relate to the basic function of the unit. It's a software problem that is so basic I can only wonder whether the engineers at Philips did any meaningful testing of the product before shipping it. If showing 50 or 60 photos meets your needs, I recommend the frame. If you want to show hundreds of pictures from a camera card, seek elsewhere.