Spa Sensations by Zinus 10" Memory Foam Mattress, King

This is actually my second "boxed" mattress purchase (from a different vendor). Anyway, this is a great buy. Just like most of the other positive posts, it was delivered as promised, I opened it according to manufacturers instructions and it expanded immediately. It took approximately 6-8 hours to expand to the 10" height. There was a slight mechanical type odor to the mattress but that dissipated after about a day. Once the wait time had elapsed I dressed it with a mattress protector and a sheet. The mattress really sleeps well. I don't think it's too soft, maybe has a medium feel to it and conforms to one's position in a gradual manner. I bought this mattress for my college age son who thought the mattress was perfect. If you are looking for a firm mattress this is not for you however, it's two or three stages away from a light firm. As stated previously, if the categories were Soft, Medium or Firm, this would be a medium. I love this mattress. You won't be disappointed with this purchase.