Hopdoddy has a unique atmosphere and probably the best burger I've had in Phoenix.
The El Diablo burger is fantastic... juicy patty, spicy jalapenos with a delicious guacamole. I highly recommend the Truffle Fries, the dip they come with is well worth the calories.
The line can get pretty long around dinnertime, but the staff will take your drink order while you wait for a table, which tends to make the wait much more tolerable.