This is the lightest boot in our review. This means it's great on the hike in to your route. Upon roping up we were pleasantly surprised with how well these boots performed. The sole is very stiff, which is great for technical climbing. The ankle flexibility is generous, as you'd expect for such a light boot. While this was a boot for rock climbing and french technique it meant for a much greater calf workout on steep ice.
Keeping the weight low means sacrificing some insulation, and as such this isn't a boot for colder weather (or those with poor circulation). Many of the boots in our review had some sort of gaiter or cuff design to keep snow out, the Rebel Pro lacked this. For these reasons we think this boot is best suited to spring, summer, and fall alpine climbing, and milder winter days.