What do you want them for - to be worth it?
I got them so I could install my heated seats. They're tough material, fit tight and cleanup nicely - I just spray them down. Some dust might sneak under there eventually - but that doesn't bother me. I'm happy with them. I think they look awesome on the grey machine.
Got pictures of install here:
P1000 - Heated Seats
Like sajnaj says - the seat covers would take more act-of-dog abuse than the seat material.