I had the same questions about Gini Rigs. I decided to email the guy at Ginirigs-usa.com as I was confused about a few things. Found out the company ship directly from their factory in Asia, this is why they are so much cheaper, they dont have middle men. I ask him about the other website ginirigs.com as the guys at there claimed they had not heard of ginirigs-usa.com, and was informed that they are both working for the company but they are battling for sales.
I was told that the guys at Ginirigs.com have had problems with their website, its been down for a month, but the guy is still trying to drive sales away from the USA site, hence "not hearing of them" and "that they are supplying counterfeit products". Tom, from the USA site, seemed sound explained everything and said that he was not being childish about their rivalry was just telling customers whats happened and it was up to them to decide. So basically had a great sale pitch, so I went for it.
I went ahead and brought an Advanced Extreme 17 from
http://www.ginirigs-usa.com and so pleased that I did. I know there are loads of good reviews on gini rigs, but better than I expected. They had a deal when I ordered, so had to order before I got my bmcc so have not tried them together yet. But attached a photo of it with my GH2