I would give the Tucson Zinburger 5 stars without a second thought. They are fabulous and it pains me to say bad things about their sister restaurant in beautiful phoenix. Maybe I would be happier with Biltmore Zinburger if Tucson Zinburger didn't set such high standards to live up to.
I have been here 3 times and my burger has been over cooked every time. Medium is supposed to be pink all the way through not a faint line of pink in the middle of a brown burger. I sent it back the first time and it was a huge ordeal so I just delt with it the next two times Ugh. The Banana Cream Pie at the Tucson location is out of this world. Unfortunately, I haven't had the pleasure of eating it in Phoenix because they have been out every time! Tucson also has these great burger of the day specials but I guess the Phoenix location doesn't do them - they should start!
I was also surprised to find that the Phoenix Zinburger was not very amenable to substitutions. They wouldn't add strawberries to one of my milk shakes. Why I do not know. They wouldn't do a half order of French fries (something I always appreciate in Tucson) and they wouldn't do 1/2 sweet potato fries and 1/2 regular - Zinburger you should do that Delux does!
Will I go back? Probably because I keep hoping that I will love this one like I love the other one but I will definitely TRY to get my Zinburger fix in when in Tucson.