As a recent returnee to cycling, I've bought quite a lot of bits and pieces in the last few months.
Evans at the MetroCentre, Gateshead, is underwhelming,
The staff seem disinterested, and despite it being a large store, the range of accessories is not wide and lot of it looks over-priced in comparison to other shops.
Halfords at Team Valley is much better, and Edinburgh Bicycle Co-op in Byker, Newcastle, better still.
I use Evans from time to time in Canary Wharf, in general they are okay, but as you said they do seem to be disinterested, also the other thing is, as it's one of their small stores they generally don't have half the items instore that I want to purchase..
now I save myself and just visit my LBS, they do my bike services, they are a great couple of guys to have a chat with, give pointers I just save my buying for when I visit them, in all honesty for it's about personal service, if it's good they get my cash.