I really liked it and it definitely exceeded my expectations. Overall well made, good performances and a solid mix of humor, satire, brutality and so on.
I'm more of an elder scrolls kind of guy, so I haven't really played the fallout games much (only fallout 3 I think?), meaning I can't really compare the series to the games.
Subjectively the one thing I would have changed, is having a bit more mystery. Feels like instead of being that naive vault dweller slowly uncovering everything piece by piece, we do get a lot of information on the background events really fast.