Brought it home from Beijing in September, new strings at 23lbs, new grips. Only used it five times. Discovered a dent on it two weeks ago. Then broke at the end of a mixed doubles game last Thursday. No clash during the game. My Nanospeed 9000S has about 20 paintwork damages on it after 4 years, still in one piece.
My friend's MX70 cracked like that as well... It just... snapped.... Victor said it's because there is a new stringing pattern :S
Broke another last night, same spot. Lasted 2 months this time. Won't use Victor again unless they give me the rackets for free.
I have 5 mx70s for a while and non of them have snapped yet. You might just need a more competent stringer
Cannot tell if it was authorized but it came with the Victor stringing instructions and warranty book. We were looking at an Yonex Arcsaber the day after and the seller told us that one is fake. Mine was real. The second one I broke was bought was in a shop in Ireland, who are based in a hall in the capital where the top club plays (the owner was a former Irish international). Racket was €5 more expensive than what I paid in Beijing. They've been selling tennis and badminton equipment, stringing services for over 10 years. Both rackets broke at the same place so I believe both are real..