Anyone tried their servos? I know they just signed Marc Rheinard and their low profile brushless servo is priced very aggressively in the market.

There's a thread started already for these servos. Probably a couple pages back. My friend and I both purchased the low profile model for our B4.2 buggies. I haven't run the servo on the track yet so I can't comment on it in that manner. On the bench, powered on, setting end points, etc I will make a couple of comments. The servo is noticeably louder than my other servos (Spektrum S6040, Protek 130SS, and JR9100S, which I absolutely LOVE all 3 of these models). This seems strange to me because the Xpert is the only one of the 4 that's brushless so I expected it to be very quiet. It doesn't wail like a banshee, but it is definitely louder. On the positive, once the endpoints were adjusted, the servo was wicked fast both on the ground and with the wheels elevated. Faster than the Spektrum, but not quite as fast as the Protek or JR. Makes sense, the Spektrum is rated at .08 sec, the Xpert at .07, and the Protek and JR at .06. The price on all of the Xpert servos is extremely impressive for brushless servos. Once I get a chance to track test the servo I'll certainly be reporting what I think.

Servos have been running great. Can't keep the low profile versions in stock. But across the board all the versions have been running really well in TC all the way to 1/8 truggies. And yes being used by some world class drivers. Rheinard, Lee Martin, Travis Amezcua, Robert Battaile and more being added all the time.