It's great during lunch hours when everything's packed. They work real quick, you're normally out in less than 5 minutes.
When it's not lunch time, though... it seems like the employees become really lazy and lethargic. It takes them forever to do anything. They also start putting away the seating hours before closing time to discourage more customers. I mean, there have been occasions when I've walked in about 2 hours before closing and I swear I saw resentment and boredom in their eyes. Oh noes, not another customer. :(
But it is one of the healthiest places to eat and I've always liked Subway, so they get points for that.