As someone who uses a bicycle daily for commuting purposes and running the occasional errand, I have greatly appreciated the service people at Williamson Street Bikes. Whether it's changing a flat, or a major overhaul of gears, brakes, derailleur, etc., the guys working there have always been polite, informative and helpful. Although there have been times where I spent a boatload of money on new gear, there have also been plenty of times when they made a quick fix for me at no charge.
In all, I'm pleased to have such a great resource so close to where I live (and nicely situated on the bike path!)