I've gotten the Stinger Seats for years, mainly because I want a back rest for my bad back. Be aware that they sit a little forward on the bench, so that you tend to be sitting closer to the row in front of you, and a little further back from the row behind you, than you would be without them.
Last year I had a peculiar problem. The seat is made of some kind of thick plastic with a zipper, and inside the seat is the foam. That foam is usually wrapped in thin plastic (akin to a grocery bag) to keep water off the foam. But if the plastic liner gets a rip, the foam turns into a sponge... and you will have a wet seat for weeks after the last rainfall. It doesn't dry out at all, so eventually I resorted to pulling out the foam and trying to wring it out myself. It was astounding how much water that seat retained. And it was a big pain. I know I looked comedic doing this in the middle of the game.