I have been learning italian with Busuu Premium for almost a year now. Overall the app does its job but there are some problems which make it annoying to use. The biggest problem is that sometimes the app does not realize that you completed a certain topic. So when you are trying to review the grammar you can't do it because apparently you haven't learned it yet. Besides that it is really annoying that after you corrected another student you get a notification every time someone does the same.