My husband, with me as his assistant, had it put together in a little over an hour. Very organized assembly. He was impressed and he had been extremely skeptical of this order. I also purchased mattresses 8 in. for top and 6 in. for trundle. I did add a mattress topper which I already had to bottom mattress. I just retired from teaching 37 years and am loving my new space!  My SheShed is just perfect with this trundle. And we can have a sleepover when my cousin and her daughter come to visit!