So I purchased only a set of it and put it in the mains at 54 with gosen og sheep 17 in the crosses at 56 on a MG rad Pro. First Day was a great experiance but my second round in my tournament it was a complete turn around. It felt flat and way more soft than my previous match. The third day in warm up the mains snapped and frayed. Not so pumped about it. It was gonna be my first move up to a high performance string but now i think i might as well just stick with technifibre polyspin for my mains. Strung at the same tension it out performs Focus Hex and if you compare durability, it's night and day. The spin wasn't as amazing as advertised either and I find Polyspin hits just as fine in the spin catagory*. Maybe when i play at college and get it for free I might string my racquets up every night, but right now definitly not worth the effort or money. I guess it proved me right. The expensive stuff always is a waste of your money. *The black color looked more like a dark blue.