My wife and I got engaged here, so I'm a bit biased about the Post Ranch Inn, but I can tell you it's the most relaxing, unique, zen-like experience I've ever had in a hotel. I'd emphasize experience (not a stay), as the Post Ranch Inn envelops all of your senses.
The checkin process went really smoothly - someone took our luggage and we were taken by golf cart to our room (cars are parked well below the guest rooms.) This place is known for being eco-friendly, and the rooms blend in well with the amazing scenery (the Post Ranch Inn is perched over 1000 feet above the Pacific ocean.)
Inside, the rooms are fantastic with very comfy beds (they even sell the mattresses through the hotel), an enormous and deep tub, no television (I liked that a lot), and a CD player which played new age music. We stayed in a Treehouse room (on stilts to avoid hurting the roots of nearby trees), and next time I want to stay in one of the bungalows that looks over the pacific. We had an in-room massage which I recommend highly.
During the daytime, we hiked the property perimeter, went to the beach, and sat in the Japanese soaking tub at the resort - this is a must-do s it has a vanishing edget that disappears into the waves 1000 feet below.
Dinner at the restaurant was very good, with amazing views out over the Pacific.
So, nothing bad to say at all. If you can splurge, definitely stay here.