The grips arrived a couple of days ago, but there was a fitting problem I could not solve.
I e-mailed the folks at Tombstone who are going to re-do the grips so they will be able to be fitted to the grip frame.
Apart from that issue the grips were solid-feeling, not at all "plasticky", & semi-matte finished. They came with detailed instructions & a tips & tricks information sheet so I can either finish them slick & glossy, or not, as I see fit.
The defective set has been returned to the seller & we are working together to get a really nice finished product. I'll update again when the replacements arrive.