We have one TSC in the next county. On my visits there I typically see lower grade brands of implements sitting outside, many of them rusting. When asking about the implements, sometimes someone might know about them, sometimes not. Inside the store I always have to ask for help finding something and sometimes people seem to know where it is inside the store. What they do have, is a lot of good prices on a lot of little parts that are 50% or even 75% cheaper than the local dealers charge. Things like lynch pins, top link pins, etc.
The thing that I find best about TSC is the hours of operation. My local dealers close up shop at, or before 5pm daily and are open 1/2 days on Saturday. No evening hours, not even one day a week. Since I live outside of town and don't pass by either of my dealers when they are open, if I need something I either have to take time off work to get it, or I have to go on a Saturday morning when I don't have any plans (which is pretty rare for me).