We can go back and forth all day about what material is better and in the end, it is going to come down to the quality of the workmanship. It does not matter what it is made from if it is not put together correctly. Unfortunately, it seems most builders are only interested in how fast they can build one and get it out the door. The attention to detail is not there even in many of the upper end units. It does not take long reading the post on here to find every manufacturer has issues with things done, or not done correctly, at the factory. Many look at using light weight as a way to cut cost, and obviously manufacturers are going to go as cheap as possible. But, lightweight does not mean it is not a quality build. The quality comes from those who care about the work they do in the building process