I came across Luxilon Savage when testing demos and was amazed by the spin and feel. I tried it in my new frames and am very satisfied. The spin is amazing...i thought i hit heavy topspin before but this is nuts! The kick serve has great action. My flat serve has suffered a bit. The ball stays in the string bed so much longer that its taking me a while to time the pronation on the flat serve but I'm getting there.