With 50 precise firmness options, it might take some time to find the setting that feels the best to you. We recommend choosing a setting and sleeping on it for a week. If, after a week, you decide that particular comfort level isn't right for you, then experiment with different settings.
Also keep in mind that your needs might change depending on things like injuries and temporary aches & pains. That's what makes an adjustable air mattress like Solaire so unique. It allows you to adjust your bed's firmness based on your specific needs.