I reckon lelebebbel has it in one: "it tells me that there are only a few of them out there so far, and every man and his dog want to fly them" Supply and demand rules in the marketplace.
On the other hand, it's not clear if Griffo's "Its plain nasty" is experience or just prejudice. Personally I wouldn't get into a Hiller for all the tea in China, but that doesn't make it a nasty machine.
Whether you like the looks and the cyclic are personal preferences, but I've been flying the R66 for a few months now, and the most annoying practical thing about it is that the tail-boom absolutely has to be cleaned at the end of every flying day to keep it looking good. And if that's the worst that can be said, I'm pretty bloody happy.
Departed the control zone this morning with full fuel and just me on board, on the way to pick up a customer. 80% and 130 kts on the dial, and sooo smooth. Go Frank