If you're planning to develop a heavy-lifting and pressing ability and want the satisfaction of a robust and stable safety platform, you simply won't get it with many racks.
They may be cheap and look OK at the outset, but the feel of using them will frequently remind you they weigh less than the weight you're squatting or pressing, or at least the levels you want to reach. The feel of a lightweight rack removes much of the pleasure in using it, and is why people buy a Powertec or Ironmaster rack when they've owned a cheaper rack.
These racks are heavier and more stable than others. Just as important, these are major brands that have been tested over twenty years in the biggest market, the US. (Check them out on sites such as Bodybuilding.com) Others may have bold-sounding names, but in fact be world-famous only in Ningbo.