well...here are my two cents....like they say, "do what works for you."
i was really struggling with anatomy, so bought every resource out on the market - netter's cards, rohen, netter atlas, high yield, BRS, small moore....list goes on....but basically, i tried different resources until i found resources that worked for me.
My class syllabus was poorly written and I couldn't make any sense out of it. I think this is the first resource (along with a text for reference)...like the above post said, it worked for them and they stick to the notes....
If you are donig fine in anatomy (B or above) with your syllabus, and your atlas, then don't buy the flash cards....you'll probably improve your performance more by just reviewing more from the same resources that you currently have. However, if you are struggling....try the flash cards.
I found the flash cards very helpful, especially for learning muscles because the information was already compartmentalized for each muscle - its origins, attatchments, innervation, blood supply, action, muscle group its part of, and special features. So, for example, closer to my practicle I found that I was weak with muscle attatchments which was big on our practical....I was able to go through my flashcards and find the ones with all the muslces. This allowed me to find information that was already organized (v. looking it up using textbook indexes, or guess from atlases), and visualize the structure at the same time...