Uncle Sam is a decent, if not spectacular, sub shop.
We were at the Squirrel Hill location today and ordered a couple of "ultra" subs for takeout, along with fries. It was lunch time but their line is pretty efficient so the wait was reasonable.
I had ordered the 'hot pepper' sub, but I didn't taste or find any in my sub; I suppose they were too busy to put some on.
Uncle Sam has fresh buns, but they don't toast them, which means that the sandwich gets soggy over time (I guess if we ate in this may not have been a factor).
The fries were good, a cut above (most?) every other place in the neighborhood; unfortunately they seem to use frozen fries rather than bothering to double-fry fresh potatoes (of course I've discovered that they don't always bother to do that in Belgium either).
Anyway: best subs in the neighborhood.