We've been renting the house for over 13 years and, this being a traditional stone-built house with thick walls, nobody has ever complained about lack of adequate air-conditioning. However, if we learnt something over all those years, it is that there will always come somebody who will complain about something new. I guess for some it's still surprising that July temperatures can be high in Istria (which, of course, has Mediteranean climate).
But fine, we decided that guests are always right, and immediately ordered two aircon unit for both upstairs bedrooms, even though the following guests then complained and didn't want them...
Which only shows that high standards and top reviews sometimes backfire and prompt guests to practically compete in theif search for downsides.
In any case, it is nice when guests speak their minds in their contacts with us, their hosts. Sometimes it happens, sometimes - as to certain degree in this case - it does not.
That's fine. We love all our guests, and accept that we are not all created equal.