Decided to treat my brother to a few days away from Hong Kong on his trip to Asia this year. Upon arrival in Phuket, we stayed in another hotel near to the airport as we arrived very late. We were picked up by the resort staff, and taken to the boat pier and taken to the island (away from all the noise of Phuket), where we were greated by the very friendly staff at the resort who came to collect us. When we arrived at the resort, we were delighted to find very beautiful rooms and facilities amongst the untampered local island life.
The villas are beautiful - very 'basic' but clean, with an outdoor shower which was amazing. The large porch has a great seating area and mosquito nets around a comfy sofa for the evening. The villas also come with their own sun loungers too, and feel very secluded and private as they are all set apart with trees.
Although the beach at the resort is not great, the pool is fantastic. When we travelled here, the resort only had a few other people staying, so we pretty much had the pool to ourselves. The beach was great for walks, but didn't mind not swimming in it since the infinity pool was just amazing! The restaurant offers some lovely food, however after our 3 nights eating lunch and evenings, it was a bit repetitive and we felt the menu was a little restrictive - there weren't any other options we were aware of. The breakfasts were very good - good selection and high quality.
I also got a massage in the spa room - very good, and reasonably priced.
The resort offered some fantastic day-trips; we did the Phang-Nga bay tour (including James Bond Island - a bit of a letdown if you are a Bond fan like me!) and the island cycling tour. Our guide for both of these trips was great fun, and showed us more than your typical tour would. We travelled by traditional thai boat, so all of the tourists from Phuket took our photos in the boat as they were on more modern vessels! This was great fun. JB island is very touristy, so be prepared for a mass of tourists there - rather disappointing but the rest of the day, and the food, was fantastic.
Although i travelled with my brother, I feel this resort is more suited to couples. It was quite 'expensive' in terms of Thai prices, but for a nice treat away from the typical Phuket holiday, it was well worth the money. On the whole, a great few days away.

We stayed for 4 days at this lovely resort. The service was excellent. I only have a few complaints, you only got 2 free liters of water per day. After that, they charged an unreasonable 30 baht per bottle. At the very least, water should be included with the room and dinners. Prices at the resort were more along western rates, while not unreasonable, are slightly above what they should be charging for this part of the world. The food was excellent at the restaurant, the rooms were spotless and the people at the resort went out of their way to make us feel like family. My only complaint with the staff is they didn't have anyone with excellent english skills.

Koh Yao Yai is quite a nice getaway a short boat ride away from Phuket. When we arrived at the island pier despite providing the resort prior notice during the reservation no one was there for the transfer to the resort. When we walked further, we saw a pick-up truck bearing the resort's name with luggages in the rear cabin. It appears that the shuttle has already left and so we had to go with them.
When we got to reception to check in, they told us our bungalow wasn't ready even though we arrived a little past 2 PM. We made our way to the pool area and relaxed with some drinks.
We were able to check in at 4 PM and looking at the lay out of the bungalows, they were really private. The bungalows are set among trees and spaced quite apart from each other, feels like we were in a little jungle.
Our bungalow was spacious, with an outdoor terrace where there are sun loungers, a daybed and the refrigerator. The placement of the refrigerator baffled us a little as we had to go out of the room/bungalow every time we want a cold drink etc.
The bed was big and a little on the hard side but it was still comfortable. The bungalow had a huge window looking out into the "jungle" and the resort main path.
The bungalow had an outdoor rainshower, it lacked traditional or ethnic touches but it had some lovely smelling shower gel.
The infinity pool is gorgeous overlooking another island across from Yao Yai.
The beach in front of the hotel wasn't good for swimming as you had to walk a long way out to reach the water.
We stayed for 3 nights and ate all of our meals at the in-house restaurant. We found the selection acceptable and prices are comparable if not just a little higher than Phuket.
Our flight out of Phuket was at 7 PM and even though we had to check out at 12, we were welcome to use the resort facilities until we left at 4 PM (last speedboat out to Phuket).
The staff at reception and housekeeping were very friendly and helpful but the staff at the restaurant and bar not quite so. We had to seek them out every time we wanted to order drinks or snacks by the pool or when we sat down lunch and dinner.