I used one two summers ago when I was lucky enough to pack an extra since my digital broke while on the trip. They really weren't the best quality of prints and look a little grainy, especially those pictures taken inside. It was probably a 1 MP or so camera since the pictures are on par with others I took on my first digital camera. I'm not sure if the cameras have improved since then.
If it were me, I would stick with straight disposables and then get the prints developed and put onto cd. This way you would still be able to save the pictures the same way you keep your other digital pics