I would love an independent sub shop. Plus, you usually get to pick your size at those places.
I'm not really that excited about Pret, because they use so much d@mn mayo on everything. They had to reformulate the sandwiches when they went to the US because of too much mayo, so perhaps I would like it better there.
Also, in a bad sign for DD, Pret found that Americans wanted filter coffee more than espresso drinks. So they added more filter coffee to the stores.
I just don't think there is a filter coffee drinking culture(?) here. People seem to drink fancier drinks or, like everyone at every office I have worked at, instant.