This has been about the 6th night I've slept on my bed and I have to say that it's a lot firmer than what I'm used to but I also don't wake up with all the acheness from sleeping on the softer spring mattress I'd had for 6 yrs. It was definitely time for a replacement.  For the price and quality of this mattress,  it's worth every cent.

BTW I waited the 72 hrs and it expanded perfectly. No smell. Easy to unpackage. If you're thinking about purchasing this mattress,  I'd say its a great buy.