I'm two happy years on a Dynamic, which went on without much futzing, at least no more than any other saddle. i did proceed from Steve Hogg's suggestion to level tail-to-nose, which may have reduced the need for many adjustments, perhaps because the uncommonly swoopy lines can be deceiving to the eye.

Also, the exceptionally long saddle rails can lead eyeball fitters astray, as they'll seek to center the clamp (or put it where it "usually" goes) as they would on the typical, shorter railed saddle.

I don't know what percentage of difficult fitments those things account for compared to people who have the wrong model or simply are hard to fit, but I do question the notion that the range of comfort positions for an SMP (in mm fore and aft) is shorter than on other saddles. I scoot around less because I'm essentially comfortable on the SMP, but I can "get on the rivet " just fine, too. Sliding up the back of the saddle is less practical though, but looking at the wear on my other saddles, I don't go there really anyway, perhaps only for a periodic stretch. The tail kick can be a reassuring element when powering hard in the saddle up climbs, I think.