Tennis Cube and Tutor Prolite are made by the same manufacturer. Can't really tell the difference except it hold less balls, weigh less, and feeds the ball 10 mph slower. Any real life experience between the two? Is the Tennis Cube made with less quality parts? Also looking at the SP Lite as well. Very tempting for $599 right now. I am using a Hip Hop right now, and I am pretty impressed with their quality. Don't know about their ball machines. Any suggestions appreciated!