I have been using different kinds of strings with my head intelligence ix3. My main concern was i was breaking my string very often and didn't want to spend 25-30 bucks each time..so i decided to try different ones and found this one. This is very durable and to my suprise it even have a good feel. It's really bad on the first day of playing but after that ...great feel. I an not getting as much spin as I used to get. Another thing is you will never have to adjust your string ever..and I love that. I had it strung at 56 lbs. I play with 54 but these strings loose tension and have them strung at 2 lbs more that what u need.