I had a trim which was fine, but I wouldn't want anything more involved.
Some tips for the stylist :-
For me I am never totally happy with a stylist chatting to their colleagues whilst washing, cutting or blowing drying my hair (I don't need you to chat to me, but don't need to hear your gossiping while you're supposed to be focussing on my hair).
Also, having offeried the Groupon voucher upon entering and being told later is fine, I'm not happy to be asked to get it out half way through blow drying and sit there with half wet hair while my stylist instructs her colleague on how to process it.
Lastly, it's never great to clout your client on the head with the hairdryer!