Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: How well does this mattress hold up over time? Please only if you have slep on it for at least 6-12 months. firmness,body divits,
Document: Nice mattress. It is heavy and bulky but its a mattress! Have had it for like 6 months. Good so far! Can't beat price and convenience if having it arrive on your doorstep!
Rarely do I sleep more than a few hours without tossing and turning. I've been sleeping 6 and 7 hours and hitting snooze just to stay in bed. It's true that sitting on the edge of the bed feels like I'm going to slide off but I didn't buy it for the edges. My body seems to get held by the mattress more so than laying on it. Great bed! I'm really appreciating this purchase.
shit! its such a really well made mattress when my wife wakes up in the morning for work I dont even know when she gets out the bed!... yeah! its like that!. its evens contours with you body... people! looking for a mattress. you found a great buy right here. O yeah! we have no more! BACK PAINS! YEAH ITS LIKE THAT.
I'm pretty much feeling like a sucker now, having bought exclusively Sealy or SImmons mattresses for well, forever. We bought this to put in the guest room, and it's at least as comfy as the $1800 Simmons we have in the master.
I read a lot of mixed reviews. But money being tight right after Christmas I took a chance. So glad I did. For the money you will be hard pressed to find better. I checked prices at local furniture and discount stores. And for this price your only other options are very cheap, thin mattress set at Big Lots. Firmness for me and wife is perfect. Will have to wait and see if it stays that way after time.
Background: I am a young adult just six months out of college, living on my own, and working. I figured it was about time to get off my housemates extra twin and get my own bed, organize my life a little. I don't have a huge amount of experience with mattresses, and I wasn't so much looking forward to haggling prices at the mattress stores (the most empty stores you will ever visit). I found out about these mattresses on Amazon, and the reviews blew my mind.
I sleep straight through, which is something I have not experienced in a LOOONG time! This mattress will serve me well for the rest of my college career.HOWEVER, whenever my roommate sits or lays on the mattress with me, I notice some serious sinkage. He's 190lb, 6ft4in. He's a big guy. I don't let him stay on the bed for too long as I'm worried the sinkage could be permanent. I don't think it is.
The fedex guy was intrigued, he said it was the second one he had delivered. Cut open the two layers of plastic and it expanded into a regular sized mattress. No smell and even though it stated to wait 24 hours to properly expand we used it about 4 hours later. It has been almost 1 month and we love it. Doesn't get hot, not noisy and not a lot of motion transfer. Haven't slept this well in a long time. Highly recommend!
I have used the mattress for over a month now, and absolutely love it. It's just the right type of firmness I like with a little cushion on top.
now i literally sleep with 1 or 2 pillows max. I don't need the rest because the mattress just envelopes your body in comfort!
Answer: had it for over a year now and I love it still as confortable as the day I got it