From the few minutes I spent playing around, I have to say the deathmatch beta (or alpha or preview) is very impressive.
Bots, observer mode, motd ... it's very nice.
I was however trying it on my laptop essentially keyboarding it as a result so I couldn't get much of a feel for anything except the atmosphere of the map.
But reading through the readme and everything, it does seem different.
I think the best thing about this project is the "alternate perspective".
What I mean by this is that this is really is a "new retro mod". It is old school and doesn't cater to fads and that is very appealing.
Case in point, some comments about the Quake Remake YouTube video expect a "skin-deep" project with "shiny new models" and, in fact, it is quite the opposite -- it 1996 Quake in a new light and something not quite Quake 1 or Quake 2 and not quite between them either.
Almost a contrarian point of view. I love that.