What you should know about this mattress...
This is a pretty comfortable mattress I do admit, and we have permanent neck/back injuries from a car accident and our weight is almost 100 lbs difference so the fact we can both sleep on this without pain earns it 4 stars...and in fact, we both found it more comfortable than the beds we slept in since at two different 4 star hotels with "premium" beds... but I wanted to address firmness differences (being as I have this bed in a couple different firmness levels as I bought them for my 3 kids as well) "Firm" is not uber firm like a standard mattress. It will have some give, but how much really depends on what you weigh. For reference I am about 135 lbs and my husband fluctuates somewhere between 210 and 220. I don't "sink" into our firm model but maybe 1/2" so for me its clearly a firm mattress, akin to a firm mattress with pillow top, for MY weight. My husband who is over 200 lbs, sinks into our "firm" one as much as I do at 135 lbs into our medium one...around 4 inches of sink down. That said, even though he prefers a traditional firm mattress feel and always has, he acknowledges this feels softer BUT this conforms to his body shape and is firm "enough" for his weight for him to sleep well and wake pain free. This has been very comfortable for him, he LOVES this mattress in firm. The firm is much more firm to me than to my husband, obvious by the sink down difference between us, as such, I prefer the medium. I also suffer back and neck pain but because I weigh so much less, the medium is heaven to me. (When I sit on my son's medium, I often want to just lay down and take a nap on it, and I have a few times lol...soooo comfy) However, while the firm is a little stiffer than my body would like from a purely falling asleep comfort perspective, its not so much so that I can't sleep on it and still wake up without pain as well. So basically, if you are expecting it to be the same feel as an innerspring, think again...it will "feel" softer firmness for firmness. However, even though you sink into it, it will still support you well if you are in pain on an innerspring and think it might be because you have too much give in your innerspring mattress or the springs are not supporting you in the right spots anymore. For reference, we had a medium sealy innerspring with a 4" memory foam pillow top prior to this bed that worked fine for me, but my husband had pain from day 1 with it that began to subside the first night on this bed. That was over 2 months ago now, and he has not woke up once complaining about his back or neck since we got this one in firm. Now he only has pain occasionally from moving around wrong while he is awake. Even though I find the medium more comfortable for my weight range, I still sleep on the firm just fine with him without pain myself...except for the part where sometimes I roll "downhill" towards him just because he sinks deeper into it than I do, but this has always been an issue no matter the mattress lol. Also, a bonus with the firm is that I can sit my glass of water directly on the bed next to me and move around, and it wont budge lol, just like a competitors commercial and wine glass (Though I would suggest a quite waterproof cover if you plan to do this, as water can ruin this bed should you actually bump the glass over)