And I want to say separately, free water in glass bottles (do not throw away the bottles). Everything in the refrigerator (including water in plastic bottles) is paid and not cheap (water, for example, 80 baht).
For us, the most important thing in choosing a hotel was a clean room without livestock, where you can come and sleep well.
We lived in a 3* hotel on Koh Samui and it was a million times better!