A good night's sleep
Having experienced the wonder of memory foam mattresses in a couple of hotels and having a wonderful sleep, we realised our old sprung mattress really was affecting us more than we thought - stiff backs/necks, painful necks, sleeplessness, etc. I kept getting cramp in my legs when I slept on my side. We did our research but it is hard to choose online and it wasn't easy finding local shops stocking good quality memory foam mattresses. We liked the sound of Leesa because it had the added benefit of being ethical, and the 100-day trial meant we had nothing to lose.
The mattress got slightly firmer over a couple of days as we unpacked it and there was a slight smell but this disappeared fairly quickly. You can probably smell something if you push you nose up to it and inhale heavily but... I don't. And it isn't a terrible smell anyway.
Straight away, our stiff backs and necks disappeared and we slept wonderfully. I am happy to say that I can sleep on my side without any cramp or discomfort.
Since we have had the mattress (now about 5 months), we now feel really glad to come home to our lovely mattress after staying away on something altogether less comfortable.