I have been going to Scottsdale Nails for years now. I moved farther away from it and made the mistake of trying other nail salons that didn't hold a match to them. Scottsdale Nails has an awesome ambiance, a great nail polish selection from both OPI and Essie, and their regular manicures last longer than any other place I have ever been to (2 weeks without chipping). My recommendation is to find a regular tech to go to. I won't disclose who mine is because she is amazing and I don't want her to be booked out if I need to get in :)
The only negative that I have is that the owner is a bit rude and dismissive. She clearly knows her regulars by now, so word of advice is smile and acknowledge them instead of acting like you are annoyed or put out. (Ie: by a simple question of where a nail color is located if you can't find it or if she could please help you put your credit card back into your wallet so you don't ruin your manicure).