I have been using Penzeys for quite some time. I use them for all the spices and herbs in my competition BBQ rubs. Chili powder and Paprika are great. But the Garlic and Onion powders are so much better then what you can get in the supermarkets, its unreal.
But probably my favorite Penzeys seasonings are the Northwoods Fire seasoning (love it on Beer Can chicken), and the Black and Red.
Looks like I am the opposite of most on here.
I have had Sam's Club for a while. Quite a few years ago we were given a free membership to Costco as a gift. I only went in once or twice, did not like it as much as Sam's, so I let the membership expire.
I just renewed the Costco membership last week. Mainly because I need to have a backup plan when the Sam's in my area is out of certain products (mainly meats for BBQ comps).
It could be just the one in our area, but I do not find the Costco to be as clean. I also like the fact that as a buisness member with Sam's, you have special hours, where you can shop before it is open to the general public. Costco does not offer this for there business membership (at least out here).
I do like the ability to buy Prime grade beef a Costco. Though the Choice grade at Sam's is very good as well.
Each of them offers some things that the other doesn't carry. We'll see if I keep the Costco this time.