The multiple timeline stuff is a bit convoluted especially for people who are not familiar with the books or games, even I've only played the 2nd and 3rd and the first indication of multiple timelines I got was the Witches ball where you see a young Foltest.
Other then that the production values of the show are pretty damn good, if not to a GoT scale yet and this is definitely the 'most' acting Hency Cavill has done in any of his roles yet, even though he is trying really hard to sound like the voice from the games.
They should have hired a more mature looking actress to play Yennifer and Triss is all wrong all the way .. she's not even a redhead let alone too dark for a nordic/slavic European based character.