From unpacking to putting up the velcro for the curtains, it took me about 3.5 hours of effort (1-man job). The instructions were enough for me to follow through the steps but there are few quality issues along the way where I had to improvise to make it work. One issue to point out is that the the instruction shows to install the velcro on the inner wall of the top bed frame, but because the center frame of the top bunk is installed at the lower ends of the wall, there was no way for me to attach the velcro continuously on the shorter side. What I did was to attach the velcro under the bed frame, instead of the inner side and it was enough to place the curtains and not look awkward.