Very happy with the bunk beds now that they are up and they seem structurally quite strong. However the assembly was far more than the hour specified. I reckon, based on my experience, 2 absolute experts, who obviously knew what they were doing and had rehearsed the assembly in advance, complete with power tools could possibly do this in the time given. Bunk Beds are generally designed to fit into small bedrooms so this limits the amount of assembly space available.
Although by following the instructions it was relatively easy to assemble, but working alone it took me nearly 5 hours to complete this assembly, with my wife assisting me only to lift the top bed onto the bottom one!
There are a few marks in the parts as delivered but nothing much to worry about and, hey, once the grandchildren climb all over them I expect there will be a lot more marks!