First of all, the Pro Staff 100 racquets I have seen pictures of, all have the "100" written as a number on the frame, but on my racquet it is written as letters, "hundred". Also, the words "Six One" do not appear anywhere on the racquet. What gives?: http://i45.tinypic.com/wu5o1s.jpg http://i46.tinypic.com/2nhi3p3.jpg Anyways, on to my mini-review... As some of you might know from my previous postings, I have three Yonex racquets and I never thought I would play another brand. But then I got a Wilson Juice 100 BLX racquet as a gift which came strung with a full bed of Luxilon M2 Pro - a racquet which I really liked. So I thought, why not, if Wilson racquets are this good, I will try another one, so I purchased a Pro Staff Six.One 100. I picked up the Pro Staff 100 this week, which I had hybrid-strung with Isospeed Axon Multi 1.25 mm @ 25 kg / 55 lbs in the mains and red Tecnifibre X-One BiPhase 1.30 mm @ 24 kg / 53 lbs in the crosses. I chose this combination because I already have one racquet with a full bed of each, so I decided to combine these two strings in a third racquet to see what would happen. I had a chance to briefly play the racquet today, and I must say, I am disappointed. Since the racquet is brand new and I have not tried it with any other strings, I am not sure if the poor performance I am experiencing is due to the racquet itself or my choice of strings and tension. Unfortunately the racquet just feels flimsy, weak and hollow. There is good control but a complete lack of power for my taste. The size of the sweetspot is unimpressive. Soft shots and volleying felt good, but for hard hitting and baseline play the racquet simply lacked stability and power. It was not an arm-friendly racquet either. Not very dampening at all. Maybe the low weight of the Pro Staff 100 (285 g) also plays a role, but it just does not feel solid. My Juice 100 on the other hand, (tension unknown, racquet was a gift) feels so much better, more stable and comfortable and provides more power and even more control. I will try to switch the strings around and use X-One in the mains combined with a real co-poly string in the crosses next time in my Pro Staff 100, but so far my first hybrid experiment has been a total disappointment. I am even thinking of selling the racquet. Any questions, suggestions or comments? I want to hear from others who have tried or who own a Pro Staff 100, to see if you share my experience and opinions of this racquet.