I strung up some Prince Natural Gut that I got for free at 60 lbs to try out. Nice solid powerful feel. It clearly plays its best on the return of serve when you need to get some power to chip a very big serve to my one-handed BH. It gives solid power and great feel for volleying. However off the ground it has less action and spin than my usual Polystar Energy strung at 58 lbs. That and along with the cost is a problem as Polystar Energy goes for around$8.50 or $6 a set if you buy a reel. Perhaps I will try a hybrid of natural gut mains with Energy crosses 60/60 lbs.