All my racks are made from melamine, and I agree, that if I could find an affordable option for home-made racks I would go the other route.
The problem is the bowing and getting pieces the right size. Once you do get it all together you need to worry about the weight, and then what happens if you have to move/disassemble them.
But at the same time, it is not terrible, but I think you need to understand the limitations and work with it.
Bruce