I've been stringing racquets for the last 35 years. I tried most type of strings(poly,co-poly, synthetic guts, multi-filament, natural gut,etc). This summer, I decided to give a go to Hyper G. Combined with the Solinco Tour Bite in my Pro Staff Federer, this string has made wonders to my game: spin, comfort and power have been enhanced for sure. Quality string. And with the escalation of prices(Luxilon), I will turn to solinco for quality strings.