I've only been once (for FourTet/Floating Points) but it was spectacular. Very good vibe downstairs; super dark/minimal light effects, excellent sound, diverse and respectful crowd, spacious. Except for all the broken glass. The concrete floor was absolutely strewn with shattered beer bottles.

The small open garden is really pleasant, though unfortunately it closes early (maybe 3-4am?). It's a nice respite from the steamy floor.

I like the art installations too.