Here is a reply from a supplier I got
"We have a 1-Year Guarantee if it starts to rust on you, but I wouldn't worry about that happening.
Not sure if you know this, but 100% of everything Blichmann sells in the USA is made in China. They are known for being the high-end brewing equipment supplier here in the U.S.. Also our source for kegs has been to Blichmann's China factory, and confident that where we get our stuff made is on par with them.
I know China has a bad wrap for stuff, but these are well made.
90% of the fermenters at your local microbrewery are made in China. So as long as you get the right factories building your equipment, they are as good!
Hope this info helps ease your mind a little about the quality of the product you will be getting
"
So it would seem WHERE it's made in China that matters.
I not seen to many complaints here in these forums- still not sure about them to be honest