Mick does a nice job , he did my2009 Vstrom a few years ago and I was happy with the ride , although I still used a sheepskin or biker beads as well but that just me ,I think you would be very happy with one of his seats and he lent me a seat while he had mine......he even gave me a test ride on his Tiger 800.. Very tasty.
If I was asked why not to buy I would say:
He uses your seat base so you don't have a spare seat
Waiting time is usually a couple of months
$485 is on the high side for a reupholstered seat
I would also be looking at the Sargent for $630 ,I think they are a better seat and easier to resell if needed .