I've had FastTrak LK and Captains (all 2.0 control versions). For the riding I do they are excellent. The rubber seems to cut up a lot less than the Schwalbe NN/RR combo I tried (both triple compound Evo Snakeskin versions) but that may be because Schwalbe design for Germany/Northern Europe/earthy trails and Specialized design for California/dry/rocky trails, and I live in southern europe.
I started off running FastTraks front and back ghetto tubeless with no problems (normal rims with a cut BMX tube), but have now moved on to a pair of UST rims with a Captain on the front. If you read the Specialized documentation, it's pretty clear that 2Bliss tyres have a UST-spec bead, but they don't call it that to avoid any licencing issues.
Anyway, Captain controls + UST rims work v nicely. I will probably try one of the new fasttraks on the back when my current Michelin XCRDry2 (cheap UST bargain) wears out.