Only for beginners

I have bought an advanced bundle and i am disappointed. The course is in fact very basic with shallow coverage of concepts and only 1 quiz per lesson. In the end I didnt learn anything new. The application is very nice but if you have already read a couple of books about chess then probably you will not find anything new. Good only for beginners with an elo < 1400 that are just starting to learn. I am a 1600 player.
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1600 player about Chess U, v4.9.5