Was visited by us yesterday because of my wife's birthday. In my opinion it's one of the best restaurants on Koh Samui, although by no means one of the cheapest. It's a also a Boutique Resort & Spa and well worth checking out
To concentrate on the restaurant part, it has a very nice menu which consists of a Western and a Thai section. We went with two friends and our children, and they also have a children menu!
Our starters ranged from a half lobster tail with a salad, a fried goat cheese to tuna and white snapper carpaccio.
As main I had a delicious tuna with a fantastic sauce. My dessert was a Zabaglione which was outstanding!
They have a Belgian chef and the place is run by Alexander, a Belgian guy who married Thitima, the daughter of the original owner of Zazen and they made it what it is today.
Here's a shot of the entrance from the ring road, the entrance will lead you to the resort / restaurant. It's located almost next to World Resort, where I conduct my IDC's. Only Sandy resort is in between them. The location is between Bophud (aka Fisherman's Village) and Maenam in the north of the island.
Here's the same picture without a flash and hopefully it gives a better impression on what I meant with the lightning. It's very intimate almost to the note that it's too hard to read the menu!
Zazen supports a very nice wine menu and on their menu is a very nice selection of aperitifs and digestives as well as cigars and Belgian beers!
For a meal with starter, main and dessert, easily calculate on 1.000,- to 1.500,-Baht per person not including drinks.
I really wish I could afford to go there more often!
Enjoy and bon appetit,