I took my beginner's course last weekend and have been climbing a few times since and it is awesome. I managed to do a couple of walls rated 5 yesterday which felt like a massive achievement when I got to the top, and made my way extremely messily through one of the very easy bouldering routes. I find it hugely frustrating how quickly my arms give out when I try bouldering, but I suppose it's one of those things where the only way to get better is to keep doing it...