Love the new features esp. the user lists. Also, the Core Japanese words list is really useful. At only 106 words, it's missing a lot, but it has a good selection of core words for someone just getting started. By comparison, I have over 4k commonly used words in my vocabulary list, so you have to leave stuff off.
PS. I picked up on a new meaning for a word today. 大丈夫 said with a worried voice means 'Are you OK?' Makes sense, If I sad OK, in English, with the same tone, it could mean the same thing.