I have been using Wilson RipSpin (black) in a hybrid set-up with Wilson Sensation. When RipSpin on the reel became unavailable (and I was initially led to believe discontinued) I went in search of a replacement. Black Zone 16 has been a great hybrid string in the mains with great spin, decent power, and just an overall great feel. It is not hard on the arm. The price is also half of RipSpin, which for a string that plays just as well if not even just a little better, is a phenomenal deal.