I would say the Anki decks are a phenomenal tool to help prepare for any exam, especially the MCAT. Although the MCAT tests thinking ability, you must be proficient in the sciences to score high. If you tend to forget certain concepts easily, the first mode of attack is to do a lot of question in that topic. Notecards are also a very valuable resource. Since Anki decks are based on a very popular algorithm statistically proven to help aid in memory recall, I think it's a good addition to your arsenal for MCAT domination. Good luck!