Feedback from the keller-sports.com team:
Roger Federer won six Grand Slam titles within three years with this racket, thus the K Six-One Tour must indeed be an excellent racket. BUT: We are all no little Federers, even if some among us might think that. In my opinion there are three reasons why one should choose this racket.
1. You have an excellent technique and fitness
2. You extensively overestimate your own skills
3. You like torturing yourself
Congratulations to those who fit into the first group. The Six-One Tour offers you a great feedback, control and precision, but only if you hit every ball exactly in the middle of the sweetspot. Otherwise…well, just watch the best tennis player of all times, even to Roger Federer this happens from time to time. It would be foolish to believe that this won’t happen to us “mere mortals”.
Result: A perfect tour racket for absolute top players with a perfect technique. For all the rest this racket is rather an instrument of torture.
Manufacturer's description:
Roger Federer's racket of choice since the Australian Open 2007. Unmatched control and feel.