I've only been to Dolce Arrowhead once- but I ADORE Dolce Chandler.
When you walk in off the street it can be a bit more pricey then other salon and spas, but once you get on their mailing list- it's SO affordable its ridiculous. They always have special menu's, discounts and even do facebook hook ups (if your a fan of theirs on FB).
For me, it's not so much about Dolce, but the people I see (I think this is the same for a lot of spa's/salons). I do know that Dolce Arrowhead has a HUGE waiting area (bigger then any other salons) including a sauna and hot tub in the spa waiting area's. Chandler and Scottsdale don't have the same amenities.
Glad you found a spa to visit =)