I think you'll find mixed responses here, the variation from gal to gal is much higher than most other agencies.

There are some agencies, like Taylor's, that you can just take to the bank.  If they're from Taylor's, then skip the reviews and just schedule an appointment period.  Others, like Flawless, require that you do a little more homework, which is tough if the provider is new and has no reviews...

Don't forget, this is what being a "pointman" is all about...  taking a chance on a maybe, and then sharing the risk with the rest of us that are also taking chances on other maybes...  And then post the results quickly here.