The delivery was fast and the mattress was packed very tight and well. I have now been sleeping on this mattress for awhile and I have to say it did not change and the feel is just the same as it was when I first got it. The mattress is long twin size and I weigh around 140 lbs.

I find this mattress to be quite comfortable. It is advertised as "firm" and that is exactly  what you get. Note that it did take about a day or two for the mattress to take its final form (relaxing after unpacking) and about as long for the factory smell to go away. I was happy not to observe any extended outgassing.

Overall, I would certainly recommend this mattress. It is a bit pricey but it is high quality.