Anyway, after reading all the good reviews and finally have the opportunity to test this ball head myself. My first impression is the rock solid built. Second is the user friendly design. With only 2 latch, I can basically adjust the position without sweat. What I really like is the pistol design which brings a very good ergonomics. This is also the reason that this ball head won many awards.
After a few rounds of trying, finally I decide to bring it home to mount on my Sirui T-1205X. If you ask me can it mount on Sirui tripods, YES. If you ask me can it mount on other tripods such as Manfrotto, Benro etc... well... according to the sales person, YES!!!
Lastly, and most importantly I got it for SGD160.
For more info -> http://www.vanguardworld.com/index.php/en/pv/products/photo-video/detail-1-4-181-558.html