KunKun the Pug 4 Compared to other mattresses sold in Japan, this was a good purchase. We've been sleeping on it for almost 3 months and have no major issues. Could be a bit thicker( maybe 5-10cm) with more memory foam on top, but overall, we enjoy it. Personally, i should have purchased the firmest version, but this version is doing well and will be used for at least 3 years. It came in a compact roll form and was ready to be slept on in 1 hour after it expanded. Bed restes on an Ikea Malm platform bed and fits very well inside the frame.