I have eaten at/ordered from the Jimmy John's on Mill Ave a couple times and the sandwiches are decent. They are of course better than most large chain shops like Subway and Quiznos but with a surplus of sandwich places in Tempe, they wouldn't be my first or second choice. Not to down them too much but I think they're a bit overrated--- I was expecting something spectacular from all the buzz! On the bright side they do deliver late into the night which is good for this type of city. However, I definitely have found sub places I like more and probably won't be having JJ's for quite a while.