The Sharks are made in France (or at least Shark is a French company). Very popular here, and a large range of model & prices from economy to expensive. I would say you see more Sharks than any other brand here. I tried a couple on, but since I was returning to the US, I didn't know if I could find service (shields, etc) for them in the US. So, I bought a Shoei.
I ride with a Shark helmet, and RSF Optima to be exact. And I dealt with HelmetHarbor. all I can say is that HelmetHarbor was very good to me and had great customer service, and I love the helmet. I don't think I am going to stray away when it is time to replace my current lid.