I have booked a bamboo Cottage with own bathroom. When I arrived, they showed me the Cottage. I was disappointed, that I couldn't say a word at the first moment. It was only a mattress on the floor, mosquito net and a fan. They showed me the bathroom which was to be shared with others.
After taking a deep breathe I checked my booking. I couldn't find any pictures of this bamboo hut. However my booking said that I have my "own bathroom". So I went back to the reception and showed them my reservation. They were prepared for my complaint and apologized that they have made a mistake giving me the wrong key. I got a new bamboo hut. The only thing which was different was that I had my own toilet and shower (outside the hut).
Since I arrived in the evening, already first rats came out running around... Wifi was so bad, that I had to do some of my (business calls) out of the lobby. Additionally there was no privacy neither in the cottage nor on the toilet since there are real walls. This also hit in during the night - you can hear the bars, 100 dogs barking at night, the neighbours, the waves in the sea...
All in all very disappointing. I would ask for some money back. I have travelled approx. 50 times to Thailand, but never had such a bad "value for money" situation.