Excellent spin, keeps the ball in play as opposed to nylon, this string is strong and last a long time. I have noticed that if you workout with weights, especially using this poly, your game will improve, and I recommend tension below 60 lbs. I have been playing tennis for 45 years and I highly recommend this particular string. Overheads stay in, Drop shots are excellent, base line power shots are superior, and your serve is fast spin and very accurate. I use a Head TI-S6 and finally found a match to this incredible TENNIS RACQUET.