These burgers are delicious - you need to pay this place a visit! They have no freezers at any Five Guys - only coolers, so the ground beef is always fresh - never frozen. Their simple, no-nonsense menu and decor reminds me a little bit of IN-N-OUT Burger, but the difference between them in taste is pretty obvious.
If you order what appears to be regular-size hamburger or cheeseburger, you will get two patties instead of one. For most people this is a little much, so try ordering the "little" version instead for a single patty.
My favorite here is a cheeseburger with ketchup, mustard, mayo and raw onions. The fries are good and a small order is more than enough to satisfy (half my bag was filled with fries in addition to the cup they placed into it with my burger).
Two things caught my attention at this burger joint that I found a little different. There are boxes of peanuts placed throughout the restaurant for you to scoop into little cardboard serving trays and snack on while you wait for your food. The other thing that caught my eye is the markerboard at the register that tells you where "today's potatoes came from" (on my visit they came from Kansas).
They have a loyal following here and get pretty busy, so you if you need to grab-n-go, you can visit their website and put your order in ahead of time.
UPDATE: If you drove out of your way to this location because it was the closest one, there is good news - a new Five Guys is now open in Ahwatukee!