Usability Analysis of Anki

Anki is a product that incorporates much of the science of learning that I want to include in my own app. So why isn't it already a good solution? Or is it a good solution that's solving the wrong problem?

I'm conducting market research to answer the second question, but in an attempt to answer the first, I'm going to analyze Anki to get a better idea of its qualities. To do this, I'll start with the classic heuristics analysis presented by Nielsen.

Full analysis here: