If you're in the area and need a Best Buy you're better off going to Northlake or Afton Village. The mall traffic makes it very hard to get in and out within a reasonable timeframe and the store is missing a lot of normal merchandise a full sized store would have.
Being attached to a mall you're really only going to find help in the cell phone or TV sections, if you've been a regular you've seen that Best Buy is following the Radioshack model of slowly getting rid of everything but high margin items such as phones and letting in reps for Dish to harass customers.
The last time I was in the store I was looking for a PS3, I could order online but if I'm spending a few hundred I want to see a box and get a feel for it first. I couldn't find anything on the floor and no one around to help so I ended up leaving without buying anything. I've also gone while I was at the mall to get a usb hub or other small items and left without finding what I wanted and no one around to ask.
If you know where and what you want or buying a phone this is your place, if not avoid it and go to a better store. Firefold is practically next door and has better prices on cables.