Coming from a pair of Prolight SLX shoes, I am loving the adjust-ability of the Factor Tech Laces without the loss in performance. The Prolights are super light, but made it tough to fine tune the fit during my ride. The Boa makes quick, mid-ride adjustments really easy. While the lower tech lace straps are tough to adjust mid-ride, they don't hold any preset setting like traditional velcro straps can do. As far as volume, I find these to fit the exact same as other Giro shoes I've had. If you're looking for a comfortable, highly adjustable shoe with an efficient sole, these are the shoes for you.