Silent partner edge broke down so many times. Replaced electronics card, it got fried when a ball jammed in the ball feed wheels. Third battery now. The handle detached from the machine (it's held together by hot glue?). Machine leaves many balls in the holder that don't roll down into the feeder, probably a dozen every time. Now the rotating thing the balls line up in before rolling down the ramp broke or something. Lifetime is about 2 years.
The tennis tutor machines are very very durable but don't have the luggage handle bar to wheel it around. Lifetime 10 - 20 years.
12.5 oz IG Speed 18 x 20 w/ polystar energy 17 @ 54 lbs.
13.0 oz Babolat Pure Drive Roddick GT standard length w/ Polystar Energy 17 @ 54 lbs.