I gave these a shot, hoping to save a few bucks and still get something usable. I returned them after 3 rides, and came to the conclusion these are the worst bibs I have ever tried. The fabric on the inside of my right leg had already worn so badly as to open a hole. But that isn't the reason I disliked them so much. The Kiss3 chamois is designed by sadists. It has extra padding exactly where you don't need it: in the middle, running below your oh-so-important nerve. Despite having a Body Geometry (Specialized) saddle open in the middle, the extra padding in these bibs was capable of filling the empty space and then push against me, pinching and causing pain. Kiss3 indeed: kiss your erections goodbye. The padding below your sit bones is insufficient, adding to an already painful experience.
I've had good experience with other chamois by Castelli, especially the X2 they use for more expensive bibs. My advice is to stay away from these. Among the cheaper bibs, my favorites (based on chamois and fabric) remain Giordana and Campagnolo (if you can still find them, since they cancelled their clothing line.)