Like all the other reviews say, this mattress is firm, yet soft enough to make a very good balance. There is no off-gassing smell. I ordered a twin, so the mattress is very light. Coming from a futon mattress with a latex core which made the mattress very heavy, this memory foam mattress feels like heaven to move around for cleaning and such. I am wondering if this mattress will maintain its shape after a number of years. If not, it's still great for now!