I just ordered AND received 48h later my Poly Sleep mattress and I have to say I am thrilled! Super easy to open and set-up, I just opened it on my platform bed and it unfolded gently alone :) 3 nights in and I can already feel that I am getting better sleep and feel less pain in my back (acute scoliosis with titanium material). Honestly, the best mattress I have ever owned --Thank you Poly Sleep!