In reply to i.munro:
I climb at AV a couple of times a week. There's a good spread of bouldering grades. It's not the biggest of walls, but it's pretty dense, and the routes are very well set and very frequently changed. The regulars are a lovely bunch. Definitely worth going to, although it does tend to get a wee bit greasy in damp weather. Although that might be the excuse we use for under-performing from time to time as much as it is an objective problem
It isn't really an issue at this time of year anyway.