Ball machine is a great tool. It never gets sick, tired, bored, goofs around, or is studying for finals. Also, it's great for a coach or other player to pop in to show a player what they are doing wrong and how to correct it right in front of them, and you can also stand right behind your son/student reminding them of swing keys or footwork, etc. Love my portable ball machine.
Wilson Ad Staff, 4 BLX Blade 98 18x20, Alu Rough/PolyFibreII. 2013 40+ 4.5 National Champs