Your opinion.

Have you ridden them? And if so, did you give them a chance to show their worth or did you just give up?

The point is versatility unlike switching to "totally tubular, man". Staying with a clincher wheelset that is 1460 grams, I can ride regular clincher or tubular clincher. Currently, I prefer and I have had more luck with tubular clinchers for flats over the 13,000 miles I've put on this bike. I've never worn out a set of Michelin Pro 2s--I have a dresser drawer full of them. But, I have worn out Tufo S33s and I'm working on my first pair of S3s.

That's my experience.