Had a fantastic time at the Castaway, this place is a real gem. Beautiful grounds, awesome beach, good bar / restaurant. The room we stayed in was small but very functional and the value of price:quality was exceptional. We highly recommend the Castaway.

Highlites:
Beach, quiet, comfortable room, good staff, dive shop on premises, great restaurants and bars a very short walk away (we liked Rann, the Irish Embassy, and the fine dining at the Layanta (pricey but very well done).

Wish we would have:
Stayed longer - we had to cut our trip to just a 2 day stay - ideally, you want to be here for 3-7 days. Its awesome and easy to get to the Phi Phi's and all the really cool spots around.
Not booked with the hotel our excursion - they dont have a concierge and thru some miscommunication, we missed our boat and had to scramble to get a trip lined up off the property (aside; just down the street there is a travel office called Green Mango Travel, on the left, who was much more knowledgeable and helpful for tours/boat schedules etc, we highly recommend them).

All in all, it was a great value, and with the one exception of missing out on our tour we had a fanstastic time. Highly recommended

We stayed here for five nights on the last leg of our trip, previously visiting Chiang Mai and Siem Reap. We just wanted to chill for five days after climbing Temples in Cambodia. For five thousand baht return the hotel organized a private pick up from Krabi airport. You can do this cheaper by public van but I didn't want any hassle. So after two and a half hrs and two ferries we arrived at Castaway.

Now I will mention before I write this review that we had previously stayed at Mai Siam Resort in Chiang Mai, and The Golden Temple Resort in Siem Reap and had been treated so well by such amazing staff at both these resorts that Lanta Castaway had some pretty big shoes to fill. This is why this resort only received four stars from me.......the staff here didn't even come close. Upon arriving at reception the girl behind the counter didn't even say hello....just asked for our passports. The guy showing us to our room acted like we were a huge inconvenience.....later in the week when I had trouble locking my room door the same gentleman treated me like I was an idiot Not cool. Again, maybe we were so used to being treated so well at the other resorts I was just over sensitive. But this is what I don't get, it doesn't cost you anything as a hotel owner to teach your staff how to treat people. Hey maybe people would tip them more and it would be a win win situation for everyone. The owners of the resort were great.....along with one lovely guy at the beach bar.
Anyway, we enjoyed the room, location, food was ok........but a few steps down the beach at the Moonwalk restaurant the attitude of the staff was night and day so that's where we spent most of our money.
In closing value for money was great, just train the staff in customer service.