My family have been long time customers of Discount Tire. The past few years their service and competence in work has taken a huge nose dive.
They are very friendly, but in my experience their congeniality doesn't make up for the fact that they don't have a clue what they are doing and don't seem to care. I frequently have to take my car back 3 or 4 times to get them to balance the tires correctly. I have caught them lying to me about rotating my tires on both my cars (claimed to have done so, but didn't, causing pre-mature wear). They lied to me about doing a road force balance that I specifically requested and paid for - they even made up road force numbers and wrote them on my report when I was watching the guy use a non road force machine.
They always set the pressures wrong on my car and they never reset the tire pressure monitor correctly. To put icing on the cake, I am pretty sure they scratched my car last time I had it in there.
I started using this company years ago because they cared about their customers and did things right the first time.
Now its just an act. There is a ton of competition in tire sales these days (NTB, Firestone, Sears, Belle Tire, tirerack.com) so my recommendation is take your business elsewhere.
Monetary Loss: $400.