I bought the king size and put it together by myself (I am a determined 47 year old woman).  Assembly was fine, not too difficult.
My mattress weighs as much as an elephant (I assume) so I was worried the lift wouldn’t work but it does.  It’s not super easy to lift (as I assume an elephant wouldn’t be) but it works great.
I live in a very small place so the extra storage is fantastic.
I can’t believe there aren’t more choices for this type of bed. I looked and looked and I would say this is the best out there.
Very happy with my purchase!