Just wanted to chime in that it's been about three years now since I purchased my Gamma X-ELS (Red) stringer. It has surpassed all my expectations and I've never had one minor or major problem with it. Best of all, it's allowed me to experiment with many different string set ups as well as tensions. Since I have some arm problems due to arthritis, I have been able to use RPM Blast at super low tensions (39M/42C) and it has significantly improved my game. I know, I know, many here will say RPM Blast will ruin your arm, but at low tensions I find it very comfortable. Also, like many other poly strings, I put in a new fresh string job of RPM Blast after every 4 to 6 hours (strings will go dead and your arm will pay the price). I am able to play with a full string bed of poly with zero discomfort. None of this would have been possible if I didn't own my own machine. The only negative of stringing your own racquets is that you'll spend a lot of money experimenting with different set ups. But eventually that "negative" becomes a positive once you settle on what works best for you, just buy a reel and you'll eventually pay off the machine instead of constantly buying single packets, drive to the stringer and pay much more. I restring my racquets at least twice a month. That saves me about $30 in labor and a few bucks by being able to lower the cost of the strings by buying a reel......so say I save $35 a month. $35 X 12 = $420 annual. In less than three years I have paid the machine off.
Special thanks to Andl for his excellent review and Herb for his super YouTube videos that coached me through the learning process and save me money from hiring a tutor