I only played one match there so far but found it small and friendly, I shall certainly go again... once I've healed up from my last mishap at Urban Assault.
Definitely do some Urban Assault before it's redeveloped into housing estates, awesome scale to the place and thanks to the efforts of the local chavs and fly tippers it's a dead ringer for downtown Aleppo!
Reckon there must have been at least 200+ people there the times I went, hence you don't get a that intimate feel you would with a1/4 that number.
So, imho it can be a bit too big for it's own good airsoft-wise as the outdoor distances don't suit the ran...