After having used Gamma Pro Live Wire 17g for years thought I would try a more current string and tried Babolat Hybrid RPM Blast 17+ VS 16 String. I loved it but it didn’t love me, after about 4-5 weeks I was developing tennis elbow so, just for fun, I tried Babolat Tonic + 16g. I love this stuff. I have also tried Tecnifibre X-One Biphase 17 String, I liked it but it doesn’t last long enough, IMO. The Babolat Tonic + 16g has the best combination of power, control and comfort of any of other strings mentioned by a wide margin. The pro who strings my racquets doesn't think much of string savers and I really don't understand how at least a few wouldn't pop out almost every time I play, but would they appreciably lengthen the life of the gut ?