Ever since I saw that the Japanese course was starting to be developed on Duolingo, I have been hyped up about it. I have only completed about 5 levels so far, so I figured I'd give my feedback on the basic lessons (at the very beginning of the course). Though there are many great things about the new Beta course, there are also many flaws that I think should be fixed:
Vocals: The voice recordings need to be remade and changed out. Many of them are unclear and are very splotchy on their pronunciations.
Character Sounds: When I tap/click the Japanese characters, they say how they are pronounced. This makes it too easy to complete the beginning lessons (matching and so forth), being that the letters you match them up with actually spell out the sound produced.
I do have to give the developers credit, though. I am very thankful that they have taken the time to create the Japanese course here on Duolingo, and have been open to any and all comments/suggestions we learners have been giving.