It didn't take long for us to put them together and they were easy to assemble. One bed is sturdier than the other though but still safe enough for our grandkids to sleep in. I climbed up while my husband was below and he said he felt the bed move a little. We purchased 2 because we have many grandkids and I know they are going to love these, spend many nights talking and talking about their day they had with us, their grandparents!!! Oh, they are darker than we thought and look almost black but still work in the room. We purchased the shortest gel mattresses we could find. Bedding comes soon! We are really happy with these!