Ever shop at Walmart? 99% of their products come from China. Some Chinese products are junk, some aren't. For the money, you can buy the CXRacing kit and if the turbo does go tits up on you, can you have it rebuilt for about $400. Or buy a new/used Garret unit and still have more cash on hand than if you were to buy the Greddy kit. BTW, that kit you linked doesn't even have an intercooler. They also don't show the manifold. It would be nice to see what it looks like. Check turbo's and intercooler kits by God Speed, they're probably the best of the Chinese brands. They have a good cast manifold on their site, probably last longer than the CXRacing one. The God Speed turbo's have been confirmed to be balanced. I can't say for sure about the CXRacing ones.
Just my .02