A good friend of mine has one in a 29' Fountain with the AZSM boost kit. Other than routine maintenance, he's never done any repair work, at 300 hours, and it runs consistently 85/87.
I have one in a 28' Nordic. A screw fell out of the rear throttle body @ 100 hours. The blower cut it into 2 pieces, 1/2 into #5 and 1/2 into #8. 2 pistons, new rings, and a Blower Shop repaired blower later, it's been very reliable. I've added the AZSM boost kit, Whipple intercooler, and it's been running great (84/85 consistently, even in hot weather). Did have to replace the mechanical fuel pump this year, but that's it.
I think they are overpriced (could have made a LOT more HP with aftermarket parts), but they will perform with minor modifications, and with regular maintenance (particulary the blower), they are very reliable.