My BAD Dreams experience follows.
I bought expensive double bed and tempur mattress.
Matress smelt terribly for months before I was able to sleep on it.
Finally when I started to use the bed I realized it was well too short of 190cm (I am 184cm tall and I can barely fit).
Dreams sent technitian who took biased measures and concluded the the mattress is "bang on" within tolerance, and I had to raised a complaint with The Furniture Ombudsman.
I have also paid to have the bed assembled, but the crew only fitted two screws out of four to secure the bedhead; I complaint with Dreams customer service, but to no avail.