Pavel

Cons: sometimes very superficial and not informative tutorials, many typos, playgrounds are too simple, quizzes are made like as just to be, mistakes in the given information. From my perspective you can find much better and free of charge articles on the internet. So, it isn't a good value for money, considering that much money they're asking for. Pros: easy to use, provides all relevant courses in one place, good coverage of topics.