I like this rack a lot. With weight plates weighing it down, I can do pullups and it doesn't move at all.
The steel isn't as thick as commercial racks, but its plenty sturdy for me. If you are squatting 300kg, you probably want something more substantial.
The dimensions of some of the bolts in the instructions were wrong, which caused some head scratching during assembly, but it was fairly easy other than that.
For the price point (on sale) this is a great deal. Highly recommended.