Finished bingewatching it last night. They did a really good job of recreating the atmosphere of the games. Unlike the Witcher, for example, it actually felt familiar to the game's universe. When they enter that town in episode 2 (or 3), it brought back memories of being in Megaton. At first, I was hoping they would do a similar Megaton plot where a shady bloke makes you an offer to nuke the city, but I suppose Lucy is too morally stubborn to even consider such a proposition!
In terms of the characters, they were as hit-and-miss as I expected. Maximus is overly wooden. I get that he was meant to have similar vibes to a Jon Snow-type of knight, but Jesus Christ, it wouldn't have hurt to make him a bit more interesting. The goul was by far the best character. Walton Goggins deserves all the praise he gets for that performance.