Where do I begin? I can only repeat what has been said several times before by previous reviewers.
This hotel is modern, clean, has great food, great staff, and lies in a nice, convenient, and especially quiet location.
First of all, there's absolutely no reason to upgrade to a more expensive room. We are quite seasoned travelers, and our standard room had everything we could ever want (and then some more). Very modern and clean with a huge bed that was one of the most comfortable hotel beds we've ever slept in. We slept very good every single night. The AC worked well and provided a wonderful relief from the heat and the humidity. Lot's of space to put all of your stuff as well.
The staff was very positive and helpful, always ready to greet you with a friendly smile. There was always plenty of staff at hand, so you never had to wait to get help.
The food was very very good (especially the Thai food during lunch time). Not that much more expensive than eating out either.
The hotel grounds are well kept. There was never any problems finding two free sunbeds next to each other, and the swimming pools were all clean and comfortable.
If I have to point out something negative, it would be that there were quite a lot of insects, both in the corridors (not at all surprising since there are no doors to the corridors), and in our room itself, even though we made sure to never leave any of the doors open more than absolutely necessary. This is of course something that really can't be avoided in Thailand.
Also, in-room internet access is something that I feel should be included in the price.
In conclusion - if you're looking for somewhere to stay in Khao Lak, look no further!