If it looks too good to be true, it probably is. I saw this website a few years back when they were hosting tours in Colombia. A friend told me about them this year, it was a total mistake. I paid upfront for a five star experience, they could not even deliver on one star.
I flew to Las Vegas, and walked around for two hours looking for a chauffeur to my helicopter ride. After numerous text and countless emails they finally told me that the event was canceled. Canceled! After I flew all the way out to Las Vegas. They assured me that they would refund my money within 7 business days. Over a month later, and no refund. I now am in the process of suing them.
Save your money, and do not send anything to SI & GG Events Co. They are a total scam.