I've been using his product religiously since they've been available. Unfortunately that's the crux of his products: they're often not available. Ubiquiti does a fantastic job of engineering and marketing (online), however when a new product hits their page - it's often months upon months before distributors get product. That being said - it's some of the best wireless gear for the money. Their new 1Gb+ (AirFiber) link hardware is pretty awesome, and in general I won't buy consumer grade wireless junk (i.e. Linksys, D-Link, etc) anymore since I can outfit clients or family with hardware like UniFi very cost effectively.

xxiao - not sure of what you mean by "mesh" but AirOS (and pre-AirOS) has supported WDS for quite some time.