This Sam's Club is the closest one to my home, and I have been coming here for nearly a decade.
The prices here are great, the customer service is typically on point, and the best part is that they don't have ridiculously loooong lines like Costco on the weekends!! The other advantage to Sam's Club v. Costco is that Sam's allows you to use a variety of credit card options to make your payment, whereas Costco does not.
I don't think I have ever had a major issue or problem @ this sams club and I also like the fact that they accept a variety of credit cards whereas Costco does not! The only bad experience that I could think of with Sam's Club is when I wanted to buy a safe from here that was on sale, and when I inquired about the price of shipping/handling/delivery the cost was outrageous ... I want to say I recall them quoting me approximately $300. So, I bought a safe that was on sale through Costco, which offered free delivery. It's always good to compare prices between the two companies.
The samples they have on the weekends in the early afternoon are awesome too, which is usually when I try to come here! :)