This Walgreens store is the only one I've ever seen with such obvious anti-theft measures when you're entering and exiting the store. It's strange but isn't really a big deal... unless you're trying to steal something, I guess.
The main redeeming quality of this Walgreens store is its big parking lot. In Pittsburgh, where parking space is often at a premium, it's very nice to know that you won't have to circle a store for 5-10 minutes (or park a quarter mile away or have to feed a meter, etc.) when you're only going to pick up a couple items.
If you're going to use the Walgreens pharmacy, keep in mind they don't accept UPMC Health Plan insurance - there's a Target up in Penn Circle that does, though.