I've never read the books or played the games but i thoroughly enjoyed the show. People complain about the timelines but if you concentrate on what you are watching it's not difficult to understand.

Obviously it's not game of thrones 1-6 but what is????

The Witcher is a great show and if you are on the fence about watching my advise is give it a go. It's very easy to get into and I think there is a lot of potential for future seasons.