Let's be honest, the best thing about Sam's Club is the food court. It's cheap and the food is good. You can get a Nathan's hot or a polish and a fountain drink for $1.50. They also have soft pretzels, pizza, frozen yogurt and other snacks for super duper cheap.
I don't really come here often, maybe every few months or so. I like Costco's selection better, but you can still get some good deals. I always stock up on cases of water because you can get 30-40 bottles for around $3. I also get the big pack of clorox wipes for like $10 and you get 4 containers. Oh and another thing is they do have cheap gas, if you are a member. My membership ends this December, and I will probably switch to Costco, then after that year see which one I like best.