I bought it for a rented apartment, for 5 months I'm still satisfied. With a weight of 90 and 50 kg, the springs do not knock out on any side, the design is integral. An ordinary mattress assembled without any fanaticism. There is no question of any orthopedic properties. The springs are felt no matter the weight, but it does not interfere with falling with an extra sheet. Strongly "Toss", but again, it's all felt if you lay one blanket. I wouldn't buy such a mattress for my home.