I'm giving this DQ 4 stars because fast food chains top out at 4 stars.
This location is far superior to the one near my house (http://www.yelp.com/biz/dairy-queen-chandler-3?hrid=y2Q2uNjOUzquKVlrPTdGyQ). First impressions: the lot the building is sitting on is welcoming. Well lit. No pawn shop next door. If you go inside, the store is clean, bright, and has smiling faces behind the counter (within reason).
I almost always get a Butterfinger blizzard. They pack the cup full of candy, giving me my money's worth. Speaking of money... in the drive-thru, they always tell me my total at the speaker (no "I'll have your total at the window"). It's a small touch, but it proves that they either can add, or have invested in a register with a computer. That instills a certain level of confidence.
The customer service is great. I always get basic manners like "please" and "thank you", maybe even "how's your evening?". The service is quick, and they can move a long line along with ease.
If you are closer to Arizona Ave and Ray Rd, make the drive to this location instead. Trust me.