If there was heaven on earth, this place would come close.
It has everything you would look for in a relaxing beach holiday - a great stretch of beach owned by the hotel, couple of beach shacks within walking distance, the best pool you are likely to see, great rooms, and staff that was smarter and more conversant in English than you would otherwise find in Thailand.
The food stands out, as does the spa, which is again, among the best anywhere in the world. There are a few activities such as treks, elephant rides, ATV rides, close to the hotel as well.
If you are looking for a relaxing holiday in Phuket, Khao Lak and the Marriot is definitely worth the 1.5 hr drive and a far cry better than the options you will find in Phuket.