We stayed here for a week and had zero issues the entire time. The resort is intimate and just off the main road so there is not much traffic or noise pollution but close enough to any restaurants. The facility itself is well maintained, the mattresses and pillows were very firm, and AC was powerful. Wifi was powerful, we had no issue connecting wherever we were. The staff is very friendly, the service is prompt and whenever we had a special request, it was met promptly. Daily breakfast buffett is nice, has western eggs, pancakes, toast, meats, salad bar, fruit, and Asian delights like rotating curry, stir fry, noodles, and soup.
The beach is right across the street. There is only one pool that is medium size, I could imagine at capacity the pool area would become full pretty quick.
If you're okay staying in Khao Lak then this is probably one of the best value and well-run resorts in town. If you're more adventurous and plan to spend a majority of your time off resort, I would recommend staying farther north which is a little more vibrant.