I broke 2 of mine within a week of owning the GTS. I now have a couple of spares for when somebody man handles the seat trying to get in the back. As for stripping the seat..no need and anyone who is quoting this is trying to rob you.
I do....2 should suffice at a time though. I do get in the habit of moving the seat myself if it's somebody who doesn't know how fragile they are. It's kids that seem to give it a proper pull and snap it off in my car. Once I have to replace one I just order another one. Touch wood in the last year I haven't broken any.