Sun Cliff resort is EXACTLY in Haadrin's center. Situated on the hil, face to Koh Samui, you will enjoy the daily sunset directly from your terracce or around the swimming pool.
Only 2-3 minutes are necessary to reach the party, the pier or the beach. Any kind of shops are really close, massage, tattoo, restaurant, souvenirs....
Panorama from the restaurant (enlarge)