Enjoyed our stay at Mook Lanta! Staff were very helpful and responsive whenever we had questions, the location is great, and the cabins are pretty good. Experience was absolutely in line with the reviews we read beforehand.
Location: a quick minute walk and you're on the beach, next to some cozy, cheap beach bars and massage huts. 5 minute walk down the road to a 24hr 7-Eleven, with plenty of restaurants in between or beyond. Cheap tuk tuk into Saladan Village. Easy walk to the Lanta Animal Welfare centre (must visit). Lots of helpful recommendations posted in the lobby, too.
Food: Amazing international breakfasts (mook muffins)! Tasty snacks. Thai food was okay, would recommend going elsewhere for that - no shortage nearby.
Cabins: Nice, rustic cabins. Bed and pillows were good. Small safe (not big enough for 13inch laptop). AC was pretty good, although not perfect if you needed to stay in the cabin during a sunny day (i.e. were sick). Blinds are very thin, so be sure to bring an eye mask and earplugs if you are a light sleeper! The surrounding wildlife is loud at night, as is the loudspeaker on the main road. Keep in mind these are simple cabins (i.e. some small spaces in the floorboards) so some bugs could come in, nothing major though. Not a problem for us.
Worth noting that we were a group split into 2 cabins, and despite identical costs, one cabin was definitely better (nicer TV with many more channels, nicer bathroom/shower set up).
Overall, would recommend!