I frequent more than one shop but, so far, the best customer service I've gotten at a nearby B&M is at Vaperz, and that's the main reason I keep going back. Everyone I've met working there has been amiable and chatty as desired, willing to let me just browse or show me gear, etc. I've swapped cooking recipes and watched RBA builds being done. Fun, relaxed place.
The first time I visited, they didn't have any juice testing, but that's changing; they started the testers with the Five Pawns and they've been expanding testing as they've expanded the premium juices they carry (Suicide Bunny, Jameson, The Standard, etc.). Another reason I particularly like Vaperz is that it's the only shop I've visited that carries at least one line of 100% VG juice (Velvet Cloud). Since I've developed a PG sensitivity, that's become important to me.
The location of the shop is odd, on the second floor of a building with some sort of medical center, a travel agency, etc. But the layout of the shop is quite good -- everything is spread out in glass counter cases lining the back wall. The only potential bottleneck point is where the cases turn a corner, but I've not had a problem yet.