You cannot beat the price of this gas! Being a member has its perks! I have gotten gas here before, but few and far in between because I'm a bit of a Chevron snob and apparently so is my car....
Two fill ups ago, I pulled away from the pump to park at Costco to shop and my car completely cut off. It only did that one other time years ago when I put Arco gas in it after religiously putting Chevron in it. I have sworn off Arco gas since then and was about to do the same to Costco gas until after that shut-off, my car appeared to be running smoother than it ever has! Now I've been using nothing but Costco (Kirkland Signature) gas when I can and if I'm here and don't need gas, I top off. You can't beat the price (if you're a member) and it makes my car run so much smoother!
Another good note is that lines used to be super long here, but now they are next to nothing for some reason. It may be due to them adding a few extra pumps.