I had a pair of tubulars that I would ride on occasion back in the 80s/90s. I stopped cycling for about 10 years due to kids and when I got back into it the clinchers had become so much better that I never considered tubs again. One day though I pulled out the old wheels, found some old tires, one a Clement Criterium Seta, the greatest tire ever made, and gave them a try again on my old steel bike. The ride was nice, just as I remember it, but I was a little corner and speed shy because of the age of the tires. I never went back to them again. I ride GP4000 now and find the ride super comfortable. I guess they've been replaced with the GP5000 and I may need new again soon.