The Gamma Progression ELS electronic stringing machine is an upgrade to my cheap manual stringer. I purchased it for both tennis and badminton, and personnel use. I have strung 6 rackets so far, checked the tension, and found that the tension was strict right on. Loved it! Easy to use machine. My purchasing experience with Anytime Sports Supply was great. Communications with Mike was easy and amicable. The shipment was little delayed as the purchase got back-ordered, but I received the package within the time-frame. I recommend this store, and will definitely consider purchasing from here in future.