has anyone used that raquet? does anyone know when was it first released? is the balance 29 cm a head heavy or even balance one?

In theory, I think 29cm is within even balance range. However, the so-call balance point is only one of the many factors that will effect your "feeling" toward a racket. Other factors might include: stiffness, grip size, string type, string tension, head frame shape, etc.

The best way is to try out the racket yourself, but not just read spec or reviews. ;)

I got this model last year as a sample (don't ask me how:cool: ).

It's too head heavy for me. Feels heavier than a 2u racket. And the swing is quite weird for me (maybe I am not accustomed to "diamond" head shape).

Your post reminded me this racket and I'll have another try in the near future.:)