I've got MicroCards and PharmCards. I used the MicroCards for class and I loved them, and I plan on using them again when I start studying for boards in a few weeks. Some people I know didn't like them because they thought there was too much detail on them, but my roommate and I both really liked them.
I then got PharmCards for class since I had liked the MicroCards, but I couldn't stand the PharmCards. In my opinion they had way too much detail, and I seemed to spend more time adding facts that weren't on there and highlighting the stuff that was important than actually reviewing them. I didn't touch them after the first few weeks of pharm, and for boards studying I'm leaning toward buying the BRS cards.