I bought the steel version direct off the manufacturer in China and turned it into a touring rack for my RTT. My initial thoughts were that the wall thickness of the steel was very thin, but it has stood the test of time so far.
It is light. It has been loaded to the hilt and driven through some of the roughest roads in the centre of Australia, it has had many loads of wood thrown on it and while the mesh is getting a bit bent from my abuse, the thing is going great guns.
I know this may not help you with the alloy version but if the quality is 'good enough' on the steel version then i see no reason why the alloy one wouldnt be the same.