Chessbase has been a professional chess site since a very long time. It consists of a variety of different options starting from latest chess articles written by dedicated chess players/professioanls/followers to a long list of useful chessbase products such as the chessbase software itself which is used by chess professionals almost universally.
It also consists of various other training materials useful for chess players such as products on chess openings, middlegame, endgame products which one can very easily sort out and choose according to their requirements. I think it’s a very useful tool for chess enthusiasts.
It also has online chess playing link of playchess.com which I have used often and I find it to be one of the best in the online market. Lots of strong players play online through chessbase and I would definitely recommend it to fellow chess enthusiasts.
The site gets the latest updates and articles of top level chess tournaments and whenever I feel that I have missed something, I go to chessbase and read the articles to get myself updated!
Also it has very interesting interviews of top grandmasters which are very though provoking.Lastly I feel the articles and analysis could have been a bit better and more dedicated towards improvement of chess knowledge of readers.But all in all a very nice effort to bring chess into the online generation!