I don't know much about them. I haven't worked for them or know anyone who does. As with all dentists in general, if you don't feel comfortable with them, find another one. Its not worth it to accept treatment if you're not confident in the doctor you get. Sometimes offices will have multiple dentists which can give you a headache if you get bounced around.
My friend Lloyd went to Aspen a couple years ago for a chipped toth. He spend a suitcase full of money on the deal, and wund up prety broke harted over the whole thing. He went ther for a dr sllipe or something and he felt she misled him. thoh this was in rode island and its probly different ther now.