6 hours with this racket and i really like it. So easy to play with. At first i thought it felt stiffer than advertised but you can feel the flex when playing. This racket is really helping with rear court jump smashes. Swings really well, cuts through the air nicely and the weight in the head helps with control and feel of the shuttle. I wish i had found this racket sooner. Using Aerobite at 25lbs currently, but might go back to BG80 for the grip/bite factor as i dont think this racket needs a super repulsive string, as the flex and head weight take care of the power side of things anyway.