So far I've read a few complaints of mistakes made in the duolingo japanese tree and I want to ask if it does make sense to use duolingo to learn the basics of the language or not. Any opinions? (:
If you want to rough out the beta period for the Japanese course, then report errors when you see them and stick with it because you'll still learn things. Otherwise, use LingoDeer instead. It's put together much better than Duolingo, in my opinion.