I love anki, I've used it from everything to Japanese to my college lectures, but my only issue is that it's UI/UX is a bit subpar, there's quite a learning curve to figure out all the little bits and details of the program, and it's easy to waste your time tweaking flashcard layout settings instead of actually studying. Then again, for me, I found often times for college lectures I rarely actually used the flashcards in traditional anki format - I found the act of cultivating all my notes, homework, organizing questions, creating layouts, creating the flashcards - that alone was 50% of the review that I needed to study the material.