I used to use them. Then, I got tired of packing them around. I was taking 10 in & then having 10 in the car. I put a catalog, order form & customer care card in them.
I've switched, though to using plastic 3-prong folders. People really like these. In the prongs, I put a guest letter, the current host & guest special, a flyer that says "So what does it take to host?" In the front pocket, I put the customer care card & wish list from the write-in receipts. In the back pocket I put the catalog. Taking 20 of these is like taking 10 of the lapboards.