I think the flashcards are excellent - the content is fabulous and the drawings make everything very clear. I have ONE issue with them and it is a VERY big issue. I am unable to test myself on most of the names of the muscles as my version of the flashcards states the name of the muscle on both the front and back of the card... this deems testing myself rather pointless as I have to cover over the front of the card with my hand in order to test myself. What a stupid, stupid design.
These are good quality and do exactly as they state. i've only used one so far and it's only got a few scratches on it - saves my iPhone getting scratched :D if you value a nice clean unscratched iPhone screen - these are a must-have product!