When I stay in Vegas, I tend to stay downtown, and the Walgreens at the end of the Fremont Experience is where I end up when purchasing little things to use on my trip. This time around, I forgot to bring a charger for my iphone in the rental car, but they sold a USB charger than plugs into the cigarette lighter plug, for $5. They also have assorted snacks, water, drinks, sunscreen. etc. The location is convenient if you're staying downtown. The customer service was usually pretty friendly more than 50% of the time.