Used on my son's racquet as Mains in a hybrid set. He's a 4.0 with limited experience with different strings, but he likes the feel of the set up and has no complaints. I researched this string online prior to using and seems to be a good balance between durability and softness. The latter being something I took into consideration given his age, high volume of hitting each week, and concern with arm health given the potential for polys to be stiff and harsh.It is okGood product, durable and plays well.