No Regrets
So far, I've purchased carpeting, interior panels and seat upholstery (over Vans foam) from Classic. Quality has been excellent in every case. As far as the CA-1 seats, my take would be that the biggest noticible difference would be the lack of "memory" foam. If you plan on doing a lot of long distance x-country, the confor foam is a plus. On the other hand, anyone flying 10 or more years ago had little choice other than urethane or conventional foam - and I really can't recall a lot of discomfort. When I'm ready to replace my existing seats, I'm probably going to go with the CA-1s as well, but with leather rather than cloth covers. Good luck.
Terry, CFI
RV9A N323TP