Went to Costco tire sales for the first time today. Was greeted promptly by the guy at the front desk and explained to him that my tires had 75,000 miles on them, and asked if he'd take a look to see if they should be replaced immediately or if there was still some life left in them. He came outside, took a look and explained how much tread was left, versus how much is needed before I change them. He also made sure we knew exactly what tires were needed for the car, and that we knew the prices. In the end we did not make a purchase, as we don't need to replace the tires yet, but because of the good service I will definitely go back in 10,000 miles or so to replace the tires. great service.