Disclaimer : I haven't stayed there, made my thought meeting PE staff and at a dive show, also from feedbacks I have from dive friends, therefore my opinion is built on experience but everything seems to converge and I must say I was each time impressed with the positive feedbacks.
You're right : their bungalows don't have any AC but fan only (AC is not a NoGo requirement in my book, Alor Divers are for instance the perfect type of well built breezy bungalows without the need of AC ) but they are spacious, well aerated with a well thought terrace over the beach.
Tried to book in 2014 after meeting them (not sure they already existed yet in 2010 or that was really soft opening !?) : they were full, resumed last year and had a tentative booking but one week later I had the opportunity to go to PNG at discounted rate... Guess which one I confirmed : easy to decide between PNG (had never been at that time) and Indonesia (more than 20 trips and counting).