Its a great idea, pretty well pulled off, especially knowing the limitations of the hardware. It wont replace my Ion slide and negative scanner, nor my Pandigital photo and negative scanner, but its OK.
The negatives have to be perfectly flat and if you have any older 35mm negs, you know they are not perfectly flat anymore. The negatives have a tendency to move around on my ipad and Ill be using a tripod on my iPhone 4 to help keep it steady.
Casey12345888 about HelloPhoto