Pretty hard to rate considering the burger was free (grand opening special). I enjoyed it and the patty was very fresh. It's a very plain and simple burger and they don't try to fancy it up. I also ordered fries and they were very good.
Here's what I can tell you though: the owner is very involved in quality control and was watching each of his employees very closely on how long the patty should be cooked, the exact amount of salt on the fries, etc and I was very pleased to see this. If anything, I can tell this place will be very consistent.
I'll visit again next week and pay for a burger and write an updated review at that time.