I had so many mattresses that kept changing from one to another and didn't solve my back issue. I can't believe adding this topper will actually help my back in a big way. I do a lot of construction work for my job and standing is what I do most of the time when performing my work. Due to my workload, my back has been hurting for years. The memory foam does help a lot with my pain since it curves to an angle to suit my body type when laying on the topper mattress. I wish I could've figured this out early. I've tried the topper for more than 2 weeks and my back only hurts for a few days compared to almost every day sleeping without the topper.The added cutting tool to open the package was such a thoughtful touch and really made me feel cared for as a customer.The topper took a bit to expand but once it did, it was so comfortable. The note said it might have a smell but I didn't notice anything.It feels soft but with just enough give. Maybe like a medium firmness. We even tested it on its own on the floor, and that was comfortable too! Couldn't feel the floor beneath it at all.I recommend.We received this in a king size and it seems to be very comfortable. It came in a box wrapped up so we had to roll it out and let it expand for 2-3 days. After the third day, we moved it to our bed. It is four inches tall and fits a king size great. We haven't slept on it long cause we did have to let it sit up for the thee days. It says 48 hours or more. I'm really pleased with it. If you don't like the full memory foam then I would recommend it since it's only four inches thick. I'm not sure if you will get hot laying on it but it is more comfortable than just the mattress. This is good for someone that can't just go out and buy a new mattress as well. Just lay on top of your old mattress and it's like it's all new again.Saw this on amazon with a reasonable price so I ordered it. So far so good. The material seems high quality. The size is perfect. The one I have is for a queen bed and it covers 100% of the mattress. After a few days of sleeping on this, I can tell it is definitely breathable which is what I need. Get this if it is always at this reasonable price.This mattress topper is perfect if you like memory foam but not SUPER soft that you completely fall into it. It's soft but offers support as well and that makes it super comfortable. Also the straps are super convenient if your bed is a little higher off the ground than normal, before whenever I slid off my bed my old mattress topper would constantly come off. Another plus of the straps are they are adjustable to whatever mattress size you have (thickness wise).This topper is a memory foam built. My old mattress is too firm and I need support for my back. This topper is soft, exactly same size to my twin mattress.Also I think I can use this along without a mattress. If I have guest coming then I can put it on the floor, it’s easy foldable( saves a lot of space ) great value.I have a very firm rock hard mattress that I absolutely hate!!! I have yet to get a different one cause this one is still practically new and was not able to return it due to pass return date.. Now with that said I tried down filled toppers and they never last they go flat or lumpy, this is my first foam topper and I was very iffy about it given the fact my mattress is memory foam. This is definitely not the best or the worst but it has helped a little with my aches and pains. It's not too soft or too firm but I was expecting softer... I have only had it for a week so it needs time yet. As far as durability and quality for only being 2 inch it expanded nicely and does not seem like it will go flat or thin out any time soon. I do sleep hot and this topper is better then my regular mattress but it's still not as "cooling" as others have mentioned. Tip:Cotton sheets are the best for keeping cool. All in all 4 stars is fair and shipping took a little longer then expected but that's okay.I am really glad that I got this mattress topper. It came in vacuum sealed package. I took it out of the package and air it for 3 days, then place it on my mattress. I immediately fell in love with it the moment I lay on top of this topper. It is memory foam and perfect firmness for me. I have chronical back pain and it really helps to relieve the pain. I felt so refreshed after just one night of sleep. Highly recommend!