Anderson Camper Levelers, anyone use them, do you like them?

I have a pair of them that rarely get used. For me, they're good for a quick overnight stop or some other time you need a fast setup. Last time I tried to used them, the kept slipping out. The time before, sunk in the sand, which pretty much negated the use of them IMO. I used boards almost always. Neat product, but their effectiveness isn't all that neat.