I took my bike in about a year ago w/ two flat tires that wouldn't seem to hold air. It turns out I just needed to have the tubes replaced. I was in good shape and didn't end up spending as much as I had budgeted, as I was expecting to need two new tires.
After not riding my bike all summer, I noticed the tires were low again last weekend. I took my bike in and it turns out I just needed air and a few minor adjustments.
When I was told I didn't owe anything, I insisted on paying at least for the time spent touching up my bike. They wouldn't let me pay and sent me on my way.
I sincerely appreciate the great customer service and will recommend these guys to my fellow bike enthusiasts!