You would just think with a name like Mr. Submarine that this would be the place to go for a submarine. Sad to say, I'd totally opt for Subway.
The prices are reasonable but the choices are slim. We're talking ham, turkey, Italian, that's about it. I believe my sandwich came with the equivalent of one slice of deli meat.
If I had to pick a word to describe this place it would be lackluster. Nothing special whatsoever. They didn't even have any bread selection, if I remember correctly you could chose between white or wheat. Which is the selection I had as a child, before people cared about bread.
A lazy, hungover mother could make a better sandwich for her kid to take to school in the morning... I know, because mine did all the time. And we never called her Mr. Submarine, at least not that I can remember.