My best hotel stay ever!I highly recommend booking this if you want a romantic and private place to be while in Koh Samed!Horizon resort and Viking resort are under the same management so this review will serve as a review for both resorts.Let's start with the location. The resort is located at a really beautiful and quiet beach – Ao Thian. There are hardly any people around so you can enjoy swimming, exploring and scenery peacefully! There are few restaurants nearby that have a big menu of rather cheap food. This resort has its own restaurant too with a wide variety of foods and drinks to choose from. The morning buffet is amazing here too. If you plan to go to the city you should rent a bike or order a taxi. We mainly stayed at this resort because it is so peaceful compared to other ones.The rooms in both accommodations are really clean, smart and cozy. Especially Viking resort's smallest room that has TV placed in front of the bed! Every room had a big bed, perfect size for a couple. All of the rooms were decorated nicely making the stay more comfortable and less dull. All of the rooms had everything needed for a cozy and comfortable stay: clean towels, water, water boiler, fridge with freezer, soaps, private bathroom, warm shower, bidet, TV, cloth rack, outside terrace and tables. I think the Viking resort's smallest room looks the nicest with its tropical vibe. My second favorite was Horizon resort's bungalow that looks more old fashioned and authentic. Both of these room types are the most private given that they are slightly more far away from the beach. Viking resort has a more premium bigger room that looks more commercial. This bigger room is really wide and has a lot of space. The interior is clean and modern. This bigger room also has a wooden sofa and more tabletops than other room types. This bigger room is also equipped with a sea view if you are looking for that.Customer service here is really what blew me away and made me want to extend my stay here. Everyone here is so down to earth with a customer service mind all the time. The staff here treated us like family here. When my partner fell sick one of the managers (P'Tick) allowed me to bring breakfast to our accommodation for my partner. I even got helped to carry the food to the room by the staff. The managers were constantly asking how my partner was doing and one the managers (P'Thom) even gave her medicine. I got the same amazing treatment when I got hurt – they asked me how I was doing and they got me medicine from the city. I can really see that the resort is a passion project for the managers (P'Tick and P'Thom).I really don't have any complaints about this resort. The only thing you need to be careful about is your noise levels in your room. The rooms leak out noise outside and at Horizon resort to the next room within the same bungalow.I intended to stay here just two nights but decided to extend my stay and made it into seven nights. The staff and location made me do it. I felt so lucky when there were open rooms for us when we needed and wanted to extend the stay, because this resort is usually fully booked.TL;DR: Peaceful, romantic resort equipped with a beautiful beach, great food and wonderful, awesome staff!10/10!