This is our 3rd comforpedic mattress. It's for our child's room. I can't say enough great things about the quality and comfort from comforpedic. We paid a lot more for the other 2 comforpedic mattresses we own. (Master and guest). I was shocked at how low the price is on Great Offer Stock. We have 2, 10 inch and this will be our first 12 inch. Our son wanted a bit softer bed, without being to plush. This seems to fit the bill. The 10 inch is a bit more firm, if you like semi firm/firm go with the 10 inch. This mattress seems to be a hybrid of firm and plush. I ordered it on a Monday and received it on Friday of the same week. It comes shrink wrapped in a bag. It's very easy to maneuver up a flight of stairs and open. Very minimal smell, once opened. Make sure to open within 72 hours of receiving. This mattress will go on a platform bed, so no feedback about a box spring. This is a GREAT quality mattress, don't hesitate to purchase. Our other 2 mattresses are 3 to 5 yrs old and still feel and look great.