One of the coolest bouldering gyms I've ever been to. Great great training area. Cool music at just the right level. The problems are varied and challenging for all levels. They break the problems in 7 difficulty levels but really I think there's more like 4.. but who cares the important is that they are well marked. Holds are very clean considering the amount of traffic. I was there around noon on a Saturday and it was a good amount of people - enough to find people to work on problems with but not too many that you had to wait. Plus the place is super family friendly with a "kinderland" for the little ones. I will definitely go back when I am in Berlin. Thanks Ostbloc! read more