Went to the new 5 Guys in Thousand Oaks last night. After hearing about them here, I was very interested in trying them out. I ordered a hamburger with lettuce, grilled onions, mustard and relish, and a small fries. I was very disappointed in the hamburger. You can only get them cooked well-done. The patties were dry and almost tasteless. The fries were much better, but not great. I'd take McD's fries over them any day.
The TO location hasn't been open very long, so hopefully this is just a start-up problem and the food will improve to match the 5 Guys hype. They have a long way to go.