I've bought a fair amount of stuff from Northern over the years. I have no complaints. It's not Snap-On by any means, but it's not Harbor Freight, either -- most of the stuff is decent and sufficient quality for the occasional user. For the most part, it's probably the best of the Chinese stuff.
For what it's worth, I have that exact same engine hoist and leveler -- we've used it many times and it is 1st rate.
John