As a novice bike rider, needing a new bike I heartily recommend
Rincon Cyclery on Hyy 12. FINALLY, a courteous, patient, and kind salesperson (the owner is best) who really knows his stuff and how to sell a bike. He spent a lot of time with me, getting the size right, and even teaching me some bikeriding tips, went through three seats to find the right one and much more.

At Sebastopol there was a nice fellow who raised the seat on a too small bike and told me it was fine.

STAY AWAY from the HUB - the owners promised to build a 17 inch bike for me, asked me when I wanted to come in. When I came in, they werent there, their employee knew nothing about it, and refused to call them, saying it was their day off and he wasnt permitted to disturb them and they would return 3 days later. When I spoke to them about it, they hung up on me. Bought my sons bike there, wish I hadnt.

At Bike Peddlar, young salespeople, nice enough, but didnt know how to sell to someone without much bike knowledte.