After buying the Castelli Vizio Tre shorts, I snagged the Principessa thinking I would like them even more given top of the line ProgettoX2 Air chamois. I actually prefer the Vizio Tre, but kept the Principessa and do a fair amount of riding in them each week. The waist band is wide and comfortable and I do love the leg grippers. The shorts are well designed and look great, but the fit is a little odd. I find they are a bit bunchy and definitely fit tighter than the Vizio Tre. I'm 5'6" 135lbs and ordered a medium and a large. The large was huge, while the medium is quite snug in the hips. I also find the chamois to be a little too much. I wanted to love it, but I find there is just too much material. These are very good shorts, but if you are choosing between these and the Vizio Tre, grab those instead or perhaps go up to the Body Paint shorts which are more worth the extra money.