I've been on a 18 month racquet search and finally ended here, posting for those that might be on a similar journey. I'm 41 and haven't played a tournament in 10 years, so have no ntrp, but play regularly with several D1 guys, some of the coaches from the USTA center in LA (my best friend from college is one of the coaches there), and as a hitting partner for the odd pro that passes through town. I started my journey using a K6.1 tour. I had used various versions of the PS dating back to my college days. I wanted to try something lighter and more maneuverable. Over the last 18 months I've used: Prince Ignite and Team, Volkl PB10mid, Dunlop 4d300T, APDGT (and +), and most recently BLX Pro Tour. I enjoyed the Ignites, especially the team, but string durability was terrible. I loved the feel of the PB10mid, but wanted something that had a little more pop. I tried all kinds of set ups with the 300T, but never found one that I really liked (I think something about the Dunlop feel just didn't work for me). I spent a good while with the APD's. Those racquets gave me the pop I wanted, but I was never able to dial in the rest of my game. I really wanted to make it work, because these racquets really helped by forehand and serve, which are my bread and butter. I did adjust some, but in the end, just couldn't get comfortable with my backhand and volleys. The BLX Pro Tour was a great compromise. There was nothing this racquet provided that wasn't bettered by another, but it also had no weaknesses for me. After 4 months with the racquet, I was just about settled on staying with it long term. Then I tried the Blue-99. For anyone that has not hit with the new Donnays, the feel is completely different. It's a dull thwack. The solid beam just feels different. I didn't like it at first, but it's grown on me. In terms of play, it hits everything I want. I do not understand why it feels so maneuverable. I replaced the leather grip with a Babolat skin feel, use 1 Yonex OG and the 10g butt cap. With that set up, my racquets weight 335g, are 6pts headlight, and have a sw of 342. Those stats aren't that different than how I had the others set up (some heavier, some lighter, but similar balance and sw). But still, it feels more maneuverable than any racquet I've ever used. I honestly think it's mostly mental, the thin beam just plays with your head. But whatever the cause, it's fantastic. This racquet has the power of the APD+ and the flexy feel of the Volkl (which is not to say it feels like the Volkl, it's completely different, but the same buttery aspect, while being much more solid...thwack). The power map is really pretty crazy for this racquet: http://twu.tennis-warehouse.com/cgi-bin/poweruniverse.cgi. It has one of the largest speetspots TWU has measured. Unlike the APD though, I find it to have tremendous control also. I feel as confident hitting off-speed shots as with my old K6.1 and the PB10Mid. Spin is great, though I didn't really have a problem hitting as much spin as I wanted with any of the racquets I played with (including the Pro Tour with it's crazy dense pattern). Serves are better than any racquet I've used. Again, I don't know if it's an actual effect, or just mental, but the thin beam seems to make it so easy to whip through the air. My reaction volleys, ankle biters and drop shots are also the best they've ever been. I work really hard on my footwork and agility, but I'm still 41. I can drill with the college guys I play with just fine, but in matches I almost always lose 6-3 or 6-4. Since switching to the Blue, I've been winning at least half the time. The subtle, but noticeable, improvement in my weapons, and shoring up of my weaknesses, has payed dividends. I tried the Black and Red 99's for comparison. The black felt the same, but lacked the power. I had to adjust the red more to get it to the specs I liked, and ended up with basically a blue painted red. Still, it had a softer feel, and I really like the crisp feel of the Blue (20+ years of prostaffs...). In the interest of disclosure, I did get a deal on my racquets through my contacts. But the same is true of the other racquets I tried. I know there has been a lot of dubious hype for these racquets, but for me, it's the real deal.