We have a super king bed and use 2 single mattresses on it. We would have preferred the LUX mattress sold by Winkl but then we would have had to change all our bedding as the Lux is far thicker than most mattresses. However, the standard Winkl mattress is a good one. Although we have reservations about whether it will really last for 10 years, as the edges seem rather soft and we're careful not to sit on the edge of our beds. But the firm certainly makes it easy to acquire their mattresses, they're efficient and deliver on time. I hope their technology is up to scratch and that we do get 10 years. The prices is highly competitive and the delivery process is painless.