I bought this Machine as my own Christmas present this December. Used twice and had no more chance to practice alone, found a group taking classes and joined them, now I always have some one to play and train with, so the machine has been in my closet in its original box until my wife convinced me to sell it. Works perfect, I just charged it once and used it twice with the same charge. What I loved is how light it is, I carry it with one hand and with other the ball hopper and my racquets on my back. I had the SP Smart before and almost hurt my back. Read lot on the web before you start using it, there is a lot of good info.