Very, very, very good burger. The burger wasn't "heavy" on the stomach at all. The sweet potato fries were good but the chocolate shake was only average though.
It was super crowed but my food only took about 5 or 6 minutes. The ambience has a throwback 50's feel to it.
If I'm in downtown Phoenix I'll certainly look these guys up. It has the taste of a burger that's made by your uncle that's the best grill master in the family!