I would not go out of my way to shop here. This little shop is located inside the South Point Hotel and Casino. It is very convenient to stop in here only when you're at the South Point.
They carry just about everything you need. The prices aren't too bad either. Not the cheapest, but not the most expensive either. Everytime we stay at the South Point, we will stop by here for something.
If you're a hotel guest, and they give you a savings book. Make sure you stop in here to claim a little souvenir from the gift shop. The last couple of times they've given a useful key chain with the South Point name on it.