I just got my NXG today and hit some serves and feed groundstrokes with it. I had it strung with Prince Polygut mains and Syn. Gut crosses at 60 lbs (assuming tension loss will occur, of course). My first impression was how much it did not play like a 12oz racket should. It felt much too light, not very stable, nor solid. I felt that my 300G w/o any lead tape felt more stable and solid than the NXG. I am going to try adding some lead tape to 3 and 9 for added stability and weight on my shots. It reminded me of my old Head Ti.S5 in how light it felt and how much it transmitted shock. It also made quite a pinging noise even with a vibration dampener on it. Any comments or feedback? Do you think the lead tape will help? I don't know what Prince is talking about when they say "Hit the heaviest ball." This racket does not come stock for hitting heavy balls.