this easily could become my second favorite place for live music in beijing (yugonyishan easily being the first)
while it certainly does not have the run-down-underground look with the crowded smoky atmosphere that mao or kollegas have, it still conveys a very authentic live-music feeling that makes you enjoy the show more than the general happening: sitting, standing or dancing you can well focus on the live act. sound and light systems ok, design decent and not too "artsy" (even tough i don't really fancy the giant transformer next to the stage but well...), and lots of space (unlike d-22 which has a similar layout) - in general you would come here to listen to the show... accordingly the drinks are nothing special (mojito sucks), but the beer is cold and what more do you need in a decent concert...
ok, the location is pretty far away from the usual music-grounds, it's still easy to find directly opposite south of carrefour, and there's loads of parking available nearby.
the only letdown is their lineup, which simply lacks diversity and it would be nice to see some local favorites every once in a while - but that maybe due to their 'newness' on the scene, so i guess that this will get better, too...

Mako has one of the best sound systems in Beijing, and the size is big enough to avoid a hard-to-breathe crowd. Started with hosting decent folk concerts, they've recently started to feature more diverse genres, but they should definitely get a better DJ to play background music in between different acts: I've been there three times and they are playing the same four tracks. Finding the place is a lot easier than I thought.