its is too soft and your body is sunk to the mattress when you lie down. and I am not that heavy. only impressive thing was the fact it took less than 5 minutes to be popped out and made the complete shape. Also, it didnt smell like others said. 
however, in the future, I will not buy any rolled mattress as it is not firm at all and will not last long for that reason. Once gain, I realised that if you want to buy orthopedic products, there is no such a thing called 'cheap good one'. Guess I was expecting too much for this price.