Too hard, too soft and just right can also hold true for mattresses.
This isn't a hard (no pun intended) subject for me, because I am very picking and prickly when it comes to "my" mattress. The very last thing I want to do is to lie down on a mattress that isn't supportive. I want a good nights sleep. So I expect a good nights sleep when I am at home and keep my fingers crossed when traveling. Rarely have I been disappointed when I travel.
I would venture to guess that about 95 per cent of our guests have no complaints about our mattresses. We flip the mattresses on a regular basis and if there appears to be a problem, the mattress is replaced.
So, my advice is, ask me! I will be able to tell you what I think of the mattress in a particular room. We have absolutely no problem changing you to another room, if available. But, above every thing else, we want our guests to have the quality of sleep we all want and need.