I had a flat tire as a result of a punctured inner tube, and the repair guy working that afternoon got me fixed up and ready to go in less than ten minutes, for just $18. Another time I went there to get a replacement screw for my bike light, and they gave me one for free.
I don't go to bike shops often enough to be able to compare OTC's prices and services to other places in Madison, but so far they've been great for my budget :)