Quality appears to be pretty good.  I can't give 5 stars because the instructions are not very clear.  There is one section in particular where the supplied hardware doesn't match the pre-drilled parts so I had to improvise the attachment with my own hardware.  Lots of the holes were not predrilled at the correct diameter to provide just enough of a snug fit with screws - some of the holes were a few sizes too small which made screwing the bolts in very difficult.