Was recently at the JW Marriott Khao Lak.
Avoid at all costs! The pictures are really misleading and the Management doesn't give a hoot.
We ended up checking out 3 hours into our stay and flew back to Bangkok.
I am 100% sure that there are many fantastic hotels in Phuket, but the JW Khao Lak is simply not one of them.
Have a great honeymoon and congrats!