I paid the exorbitant price for one of these for my gsa. Similarly I liked the idea that you didn't have to put holes in the original guard.
It fits on pretty tightly and looks neat, did have slight worries that large rocks or a big dunk into the mud would knock it off, but probably the screw on ones wouldnt like that much either!
Does a good job of keeping the front of the motor and cross pipe clean. - I'd still like one of the stainy steel crud catchers as well though, just because they look pretty cool! (and I'm sure they work well) Have to save some more pennies!