While it’s tough to tell what effect, if any, the magnets have, this much we noticed: The M Pro No. 1 puts a slight charge into your shots if you have a long, fast swing. You may also notice the unique beam shape. Whereas most frames have side walls of equal measure, or ones that get thicker as you move from the head toward the handle, this model is fatter in the head and skinnier in the throat. The tapered design gives the racquet a whippy feel, which appealed most to power baseliners who hit with lots of topspin and play the angles. At net, playtesters said that maneuverability was excellent, but they struggled to consistently stick their volleys, perhaps because the frame is so flexible in the throat.