As the title suggests, if it fits, this is a super shoe! First of all to the benefits: Have a previous model to compare the K2 X-Training Mach 100. Great Skates, stable, still quite agile and very comfortable with HiLo-rail. Unfortunately, they were a little too slowly overlooking the Berlin Marathon this year. Currently, about 20 km / h average. By comparison, the Radical Pro longmount: Unwrapped, great sight, looks very stylish and fast. After the heat-molding of the shoe also has made a good impression on the foot, even if the bead has pressed a little above the ankle. First test drive about 15km, not really given full throttle, my first shoe without higher shaft, since you have to first get used to it. Unfortunately, the bead has made more and more noticeable and even the tongue of the right shoe had a seam, which was quite unpleasant sides. The return trip went, confidence in the Skate grew, the pain at the ankles unfortunately: / reason for this is probably due to my relatively thin legs, so that the opening of the 'bulge' above always had game, when I pulled the trigger myself have. So she pressed on every side movement and then did unfortunately quite hurt. Now the huge shock after the trip: no full throttle and in terms of a test drive, I was quite cautious on the 15km already 4 minutes faster than my old skates, ie tight 2km / h more average speed. In addition, the shoe has really a great, quiet directional stability, as a result of four equally sized wheels but also a huge turning radius. But that one takes for such speeds in purchasing. In addition, due to the missing damping by a nonexistent softboot is skate really hard to drive. Come to me in this form not in question, because my routes or meantime rougher asphalt have a few smaller wooden bridges. The rattles quite nicely;) Unfortunately for me outweighed the disadvantages, the benefits, so the skates go virtually unused back: / Will now try the Radical Pro and hope that I by the (for me) perfect compromise between speed, maneuverability (HiLo) and get comfortable. But who is only on speed from, has the right feet and appropriate training routes, has held this skate a real convenient alternative to a Custom Boot Racer (loose two to three times as expensive).