The Restaurant at Santiburi Koh Samui
The restaurant at Santiburi Beach Resort & Spa is recommended by reviewers writing for major publications. Of the 5 professionals that we monitored, 2 mentioned the restaurant, like Fodor's and Oyster.
Santiburi Koh Samui 
Fodor's
Oyster
Fodor's "The main building, a classic Thai pavilion overlooking the oval swimming pool, has European and Thai restaurants"
Oyster "There's a huge swimming pool, a kids' pool, a sports complex with a tennis court, Thai boxing, billiards, mountain bikes, and yoga, plus three fancy restaurants and several bars"
