Some observations after playing with Astrox 100 ZZ 4U for 90 minutes men's doubles. My current racket is Astrox 88S 4U. When swinging ZZ in the air it feels really hard and stiff, you imagine hitting the shuttle is like hitting metal pole with baseball bat. But that is not the case, racket feels really solid.
Overhead shots are easier than with 88S, clears were sailing long initially. When smashing there is clearly extra power available and shots are steeper. Racket swings really quickly and effortlessly despite feeling more head heavy than 88S, stick smashes are also excellent.
I had few timing issues on flat drives, racket swings and bends bit differently compared to 88S. Surely this issue will go away after few more hours of playing. On defence it feels as fast as 88S, initially I can feel head heaviness but it cuts through air like a knife. Blocking opponent attacks is a very easy, I could hit defensive shots accurately and effortlessly. Especially lifting is good, my high lifts were like 2 meters higher than with 88S using same amount is power. Net area is about same as with 88S, both are quick enough to kill loose opponent netshots. Spinning netshots are easy to execute thanks to solid feeling.
To sum up for me this racket is equal or better than 88S in all areas. It was very easy to start playing with ZZ after being familiar with 88S. So I've got few 88S for sale if anyone is interested
. At least we can spend some little of our time to fill our brain with other thing rather than just filling it with information of increasing victims & dieing people in all news channel
Nice racket. And nice feeling. Picking it up for the first time is deceiving tho. I really thought it will be not as maneuverable as this. 
