Their employees per section don't know anything about their section(at least all the ones I have been to...probably around 10 or 12).
Oh god... Allow me to reinforce this statement with a story.

A few years ago my family was going on vacation, and we wanted some blank cd's to burn music with. So we go to walmart and ask the guy in the electronics department for help deciding what to buy. We had some blank cd's in our hand and asked if they were a good deal, but luckily he was there to give us the BEST deal possible. So he had us put those down and buy cheaper blank cd's. After that we got home and we realized that we did not have blank cd's, but instead we had purchased purple CD cases.