I've been using Duolingo to learn Spanish, and there are a lot of things I dislike about it. However, credit where credit is due, I don't have a huge drive to learn but rather I'm opportunistically learning as I have time for self improvements sake. And for that, Duo does an ok job of feeding me new lessons and slowly expanding my knowledge of the language in a few minutes a day, and it's free. After about three months I can go to a Mexican cafe, get a table, ask about the servers day, and chit chat about my kids, all in Spanish.

Which, if I'm being honest with myself, is more than I would have gotten self studying.