I don't care for laminate. I have one on my Omega muzzleloader and would love to upgrade to a synthetic thumbhole. In cold weather mine feels slippery in the palm...and feels cold to hold in the hands. Maybe a thumbhole laminated would feel better. That's just my two cents worth.
Have you ever compared the 2? The laminate is much more comfortable and "warmer" to the touch than synthetic. The laminate is a little slick on the Omega.. but that could easily be remedied with a little stippling work.