My all time favorite lunch spot when I lived and worked in the Southwest...not the healthiest but definitely hits your right in the flavor zone, it's that good.
Choose your burger size, style (they have a create your own option), every single time I walk out of here, I walk out with a more than full stomach. Reasonably priced and very casual - duh, it's a burger joint, but like, not the kind that gives you a stomachache for three days...
Milkshakes are awesome and the place itself is always clean.
Overall a great place to pop in for a quick lunch, easy dinner.