I hate the smell of it and the way people think it's healthy to eat there. I used to work with a chubby girl who always got her lunch from there and went on about how it's the fat-free version of fast food. I laughed in her face. Also, college people always got their lunch from there and come into the classroom with big stinking sandwiches full of shit like meatballs which used to drip all over the place. Ugh.
I don't go there with the pretensions of it being healthy, but I do like a nice tikka and cheese sub. I consider them nicer than McDondalds or Burger King. KFC is alright too, but dislike the grease and the chips can sometimes be really horrible.
Proper takeaway food is miles better than all though, IMO.