Last week I was visiting NYC and decided to visit B&H store for the first time and while I was impressed of how busy the store was, I sensed an unwelcoming attitude and one dude told me I couldn't take photos inside the store. Maybe its just the normal tone of New Yorkers, but I have to say it's kind funny that I couldn't take photos inside a Photo store.
On this particular point -- I get just the opposite feeling inside that store, though perhaps that's because I'm a New Yorker and have morphed into an unwelcoming person myself without realizing. I've taken lots of pictures in there, with their equipment or mine, everybody seems to understand it's necessary, very surprising that you had a problem. I'm a new customer but beside their low prices and gigantic inventory the best part of it is their sales force. They all seem to be photographers, many of them professional (what digital hath wrought!) and every dept I've visited had at least one who could conduct a very useful class for my benefit on the spot. It's true I don't know much, but I was impressed. Not all depts are equal; beware. And also: they refuse to carry many of the good-but-cheap alternatives -- speedlights, radio triggers, movie stabilizers -- for cobbling systems together and for DIY, B&H is a lot less helpful than it might be.