I've only played with the China, Taiwan and current TW one.
They don't seem to be more prone to breaking than other racquets.
I've only broken about 5 in the last 10 years. The K90's break more
often IMO. Broke two in two years. all broke at around 7 or 8 o'clock or
4 or 5 o'clock.
I think the key to reducing racquet breakage is to not hit overheads like a
madman. Just put it away. No need to go for maximum velocity.
http://goo.gl/NPBIWt (How to serve like Sampras)
http://goo.gl/KZfDaJ (Star Wars superfan battle)