One of my rackets is a Volkl Vsense8 300 that I strung with the Cyclone 19g. Nice pop and great feel with plenty of power and control and easy on the arm. I'm pleased with this string and have been experimenting with different brands and gauges. Not sure about the durability but so far it's held it's life now for 3 weeks playing twice a week.
Great string. My racquet is a 18x20 string pattern, the 19G string works really well in the dense pattern. I was initially concerned about the thin string, but it has held up very well through 5 games.