I just recently moved to Tempe about a month or so ago and was immediately on the search for a new sandwich place (considering my favorite from my old city was only located there). I had heard a lot about places like Jimmy Johns, and have both a Subway and Cheba Hut right next to my place, and I tried just about everything before I got to Silver Mine---I wish I would have tried them first!
Their subs are REALLY good. My two favorites are Dodge City and Cripple Creek. They are really easy to order from, as you can go into the store, call them, or even order online for pickup or delivery. I usually have them deliver and they're always super quick---usually 15-20 minutes tops when they give you the estimate time of 30 minutes. Not only that, but they deliver until 3 AM which is perfect for Tempe considering it's a generally young crowd who are up late and partying and get those late night munchies.
They are a little pricier than some other places but they always have coupons and deals for you while most other places don't offer this. Even with slightly higher prices, I think they're totally worth it. I'm a 100% Silver Mine fan now. Keep up the good work!