Alright let's start from the beginning, the mattress arrived in a box that appeared to survive some great battle. My guess is it was accosted by a secret society of ninjas sworn to a life of assassinating mattresses, no doubt hired by one of those big box mattress stores. But my mattress fought against all odds and came out the victor. Once the box was removed I found the mattress quite flat and doubled bagged (it kinda looked liked it was trapped like General Zod in Superman 2 when he was trapped in that mirror thing then thrown into space), I set forth to remove the plastic and free my new mattress from its infernal prison to which it thanked me by springing to life. I positioned my new mattress on my platform bed frame and left it to get it's swole on. After a few hours, I revisited my mattress with a tape measure and confirmed it reached its full potential. Now it was time to try it out. After making my new bed I settled in for the night and my bed instantly molded to me like a warm hug from all directions. Not to firm, not too soft, just right. The one drawback is when you try to move in the night. Because the mattress molds to you when you try to escape it's harder than getting away from that stage 5 clinger girlfriend you had in high school (I'm looking at you, Stacey!) Honestly, the 10-year warranty is fairly useless given the percentages they will refund versus the cost of the mattress but at the same time that is cool with me. Even if I got a few years out of this mattress I've gotten my money's worth. If you're on the fence about getting this or getting one of it's high priced cousins the answer is easy, get this mattress, it is fantastic. Just hope yours too will survive the ninja attacks in route! Update: I have changed my 4 star rating to a 5 star rating. I realized that part of the problem with softness was actually my box springs. I am in love with this mattress so much. I just purchased a 2nd queen size mattress. The queen arrived with packaging intact this time. It’s the perfect firmness. Not too soft, not to hard. Just right. I was really excited about this mattress. It arrived with the packaging completely destroyed. Which seems to be a common theme reading the other reviews. Quite honestly, if actually made it getting out of the box a little easier.First impressions:Pros:It is a full 12 inchesIt did NOT have an odorI was able to sleep on it the first nightIt is very comfortable, not a hard mattress at all not too soft.It doesn’t get hot.ConsPackage was destroyedIt’s a little difficult to sit up for long periods of time as you sink into itGetting out of bed takes some getting used to.UPDATE! IVE HAD THE MATTRESS FOR A MONTH NOW AND MY OPINION HAS CHNAGED. IT DOESNT KEEP ITS MEMORY FOAM SHAPE. I HAVE AN INDENTATION IN THE MATTRESS WHERE I SLEEP. TUE MATTRESS NOW CAUSES ME PAIN BECAUSE IT FEELS LIKE ITS SUPPORT HAS LESSENED.I will most likely purchase a newer, more expensive, tried and tested mattress in the very near future. It seems to be a common theme that those of us that need a new mattress, but at an affordable price, do a ton of research. I searched for weeks online for different mattresses at different stores and tried to see who was having specials (I tried to know which one I wanted by Amazon Prime week, but I just wasn't ready to decide by then!). I looked at beds that had thousands of reviews because I thought those would be most reliable due to the quantity of those that had tried the bed. I looked at beds that didn't have a ton of reviews (like this one with I think like 400-700 hundred, I can't remember), and I also did Google searches to find more thorough reviews from professionals. My goal was to buy a king size mattress for $250-$300. I was really close to picking the Amazon Basics (or something like that) and I can't remember exactly what pushed me to this bed, but I think this one was actually a bit less expensive for the 12in size vs the 10 inch and from my research I did gather that the general consensus was to get as many inches as possible (that's what she said) because a memory foam bed probably wouldn’t expand as largely as it should. So the Vibe bed it was!I ordered on a Thursday and it was supposed to arrive on Saturday (the day my new bed was to arrive), but lo and behold I had it by Friday night! As you see the box came it a very good condition (something I think some have complained about). So I am a single woman and had to get it up to my bedroom on the second floor. I will say it took a bit of elbow grease, but I managed to walk it into the house and then slide the box upstairs and into my room. DEFINITELY do not remove the bed from the box until you are ready to open it.Once upstairs, I laid some blankets down and then pulled the box off (while leaving the plastic on). I unrolled the mattress and it expanded to about 8 inches in less than 20 minutes and 10 in less than 20. I couldn't resist trying it out, so I cut the plastic a little bit and crawled in (seems weird, but with two kids I did not want that plastic off until the mattress was going to be immediately covered with a mattress protector and sheet!). It was decently comfy!Like it wasn't super firm by any means, but my ideal bed is one that literally feels like a super soft pillow, so I did notice a difference there, but it was 95% fine. Like I know a topper would take this bed to 110% amazing so I am good with that.Two days later (I didn't really check the next day) and the bed was fully at it's 12 inches. I was VERY impressed, because the pics in some review of memory foam beds made it look like the edges of the mattress never really took on a rounded square shape. Not this one! This bed fully looks like a completely even, regular mattress.And I have been super tired lately so that could contribute, but honestly I have never slept better on a bed! I set an alarm to wake me up halfway though the night so I can see that I have more time to sleep, and with this bed I always miss that alarm!I snuggle up in this bed with my nice warm comforter and that is all she wrote!I have no comment about whether the mattress gets hot, because with comforters I would have no idea how someone is able to attribute being hot to the mattress and not, um the covers?Overall the only thing that could make this bed better is if it was just a smidgen softer, but truly for the price I would definitely pick this bed again.Some memory foam users complain that the sides begin to sag eventually so I am praying I don't encounter that. Overall, I know this review is rather lengthy, but I wanted to give a review that would have empowered me to take the plunge when I was shopping. Hope this helps! Took a nap on the mattress and woke up with a migraine. The mattress also never fully reached 12 inches after decompression. Upon research I found out that the company is pending a legal sanctions failure to list Proposition 65 tags on products and warning the customers of the health risks caused by the chemicals that are contained within the mattress. products. I don't doubt that the mattress foam is Certi-Plus, however I am not so sure about the mattress cover and zipper which smells.