Having read such amazing things about Signum tornado I thought I would try it. I played with it for a week or two and liked it. After a week and when the matches got serious and I starting pushing myself and my shots I really started to hate the string. I have now gone back to RPM Blast and I really don't care what anyone says you can't compare the two. Tornado is an ok but cheap low end string. RPM Blast is a great high Proforming string, maybe the tension stability isn't quite as good but you cant compare the two when they are both fresh. RPM Blast is miles ahead in every way.