I actually downloaded and played Nexuiz today, yeah my Steam is out of action, I don't own any non-steam games and I was bored.
It was impressively well made, engine and interfaces seemed smooth (though the interfaces looked like they were designed by 80s d&d nerds) but the in-game content was pretty poor. Mostly pitiful maps (tho I did eventually get to one that looked passable) and the characters were meh. Best thing about it were the weapons & weapon effects, it got quite 'pretty' when there was a lot of action on the screen.
Probably won't play again though, gameplay was just tedious dated deathmatch, I mean even something like the Tribes (1) demo, free and 6? years old mops the floor with it.