Here's what you get:
Minimal creep on lock down.
Able to support massive loads.
Arca Swiss QR system
Good customer support (in theory)
It costs money to make a well engineered product, though there are some nice looking competitively priced heads around. A high grade ball head is well worth the money if you take a lot of photographs, and want it to perform well many years after purchase. In theory the Chinese should be able to produce a quality product at a bargain price, but to date they seem to want to market a product on the basis of features and the quality is not there.