been buying a few tires a year from there for 10 years or so, but they left me hanging a few months ago and I haven't been back...
2nd day after I got wife a new sante fe, she hit a bolt in road which was sticking right in the center of tread, but blowing air out enough that i heard from passenger seat, we were right by discount so we pulled in, this was 10 minutes before closing time... everyone was hanging out in the still open garage door, guy asks if i bought it there, then after i say truck is 2 days old, says sorry, my computer is off.. luckily i found a place around corner that was open, they didn't speak english , but they pulled tire off the rim and patched it in 5 minutes.
edit: I know there are some great stores around, and definately depending on where you live, but maybe in a larger city the customer service seems to only be there until you've paid..