How about other online learning sites like Babbel.com? Has anyone around used it and can comment on how good, effective, or otherwise it is? On thinking about

How about other online learning sites like Babbel.com? Has anyone around used it and can comment on how good, effective, or otherwise it is? On thinking about learning a new European language, I had thought about using Duolingo for the first months to start getting some vocabulary, then jumping maybe onto Babbel for more serious study. But not sure if that works too well as far as online methods go.