Supportive, environmentally friendly & a decent compromise

While both my partner and I wanted a supportive, environmentally friendly mattress, she prefers a firmer feel and I prefer a softer feel. We both tend to sleep on our sides and have adjusted to this mattress fairly well. (Her previous mattress was extra firm and 10 years old; my previous mattress was soft and several years old.) One thing I noticed early on in is that I started to sleep on my stomach more, which exacerbates my neck pain. This is partially due to the mattress being firmer than my body can tolerate for a whole night (since I primarily sleep on one side due to an old shoulder injury) and partially due to occasional insomnia. I will say that while my body has become more accustomed to the firmness of this mattress over the past 13 months, I kind of wish we had gotten the soft version. My partner and I are both 140–150lbs and are 5’4” and 5’8”.