Strings make a big difference in racquet feel. Extreme Pro was great when I first played with it for a while, good power and spin and more flex than the APDC. But all of a sudden, I couldn't be consistent anymore..I couldn't even hit a backhand over the net. Sonic strings on that racquet...which sucks. APDC is a great racquet...very spin friendly, but a little tough to flatten out a shot and to me, not as powerful as the EP. Didn't like the Radicals.