I have never gone to Sam's and come away completely satisfied. Much like a Chinese restaurant.
It's hard to ever be sure if Sam's will have what you're looking for. If your favorite 65-gallon jar of pickles happens to be bread 'n butter, they'll only have the 65-gallon jar of dill. Never the right pickle. Ever.
Today was a great example. I went there for a tall office chair and a small flat-screen television for my office. What I found was a 25-pound drum of chicken cacciatore. Can't watch it, can't really sit on it.
Sam's never stocks the same products two visits in a row. They USED to have tall office chairs. Not anymore. As for the television, of course they're out of the model I wanted. But oooh... that cacciatore.
From now on, when I feel I need a particularly unsatisfying evening, I'll go to Sam's. Then on to Wang's House of Chow.
UPDATE: I received a really nice Samsung 22" flat screen HDTV monitor for my birthday, goes great in my recording studio. Thanks T and kids...