The TV series is actually what got me started both on the games and books. Cavill did a fantastic job playing Geralt.
Little bit of forewarning though. Maybe it was because I knew absolutely nothing about witcher when I watched the show, if you watch it, you're just going to be asking "what?" for a while. And if you're expecting the show to adhere to established lore either within the books or the games, don't. I know it takes some liberties in places (such as the nilfguardians being portrayed as generic bad guy ruler and bad guy army).
Witcher also got caught up a bit in identity politics. Both the books and the games are based off dutch folklore I believe, so most people you meet are pasty whities minus in-lore cultures like the ofieri people or zerikanians. It drives a bit of a wedge when you're watching the show and you kinda get the feeling that certain characters were dropped in there for the sake of diversity rather than lore accuracy. But that can be overlooked if the actors are at least doing a good job.
I think in earnest, it's decent, but clunky and unrefined. I think if the showrunners overcame some of their pacing issues, stepped out of the political spotlight, and stuck a bit tighter to the lore of either the books or the games, they'd have a great series on hand.