the number of bike shops in London with unhelpful and condescending staff is ridiculous.
Funnily enough, Evans have always been alright for me. My shame list is: Cavendish Cycles, London Fields Cycles, Look Mum No Hands and now Cycle Surgery. I may have just got them on a bad day, of course.
I used to go to Mosquito's which isn't too far out of your way, they were good.
I've always found CS really good (much better than Evans), guess a lot depends on the branch and staff member.