Like others, I couldn't imagine ordering a mattress online. I read all of the reviews and took a chance--and I'm so glad I did!!!! This mattress is, quite simply, the best I've ever owned and the best one I saw/tested anywhere! I got the "soft" and it's perfect. You have to keep in mind that memory foam mattresses are generally more firm than other kinds of mattresses. The "soft" then was perfect for me; it's not at all squishy, nor do I sink into it too much. It provides outstanding support (I'm 5'5" - 150 lbs; female). It is closer to a plush (not pillowtop) in softness relative to traditional mattresses. I really don't see how mattresses stores stay in business--given how great this mattress is and the fantastic value from Great Offer Stock. Delivery was easy and, yes it comes in a big black bag. Mine rose to full size almost immediately. No bad odor at all. I'm certain that a "medium" or "firm" would have been too firm for me. If you're in doubt, I recommend going "softer" than you would ordinarily think. I'm extremely pleased with my purchase--and I'm the pickiest person alive!! LOL