Great for beginners

But if you already know the basics like oui, non, bon voyage, etc, be prepared to wade through a lot of tedious repetition. It looks like you should be able to customize the review manager on the website, but It only gives me 404 errors when I try to modify the vocabulary settings. There are a few advanced words, but its not pleasant spending five minutes on words I already know for the sake of practicing one Im not familiar with. I do think the modest monthly fee is worthwhile for beginners, but the description making it appear its good for advanced vocabulary, or even barely-intermediate like me, is a reach.

David Weedmark about Babbel – Learn French, v2.2.2