We spent 6 nights at Tropical Hideaway and we absolutely loved it. The staff is incredibly kind and helpful and the facility is beautiful. Unfortunately, we didn't have a rental car as planned, but there were things to do and see in the immediate area within walking distance. There were many restaurants close by and we also ate at the hotel several times because the food, while not traditionally Korean, was delicious.
It was a nice surprise to be able to see the Jeju women divers right outside our window one morning! Much better than the tourist "show" that is available!
The large infinity pool was heated to a perfect temperature as was the smaller soaking pool. The sauna was small but big enough for two and the lounging cabanas were very comfortable.
There were only a couple of things that would have made our stay even better.
1) Since we didn't have a vehicle, a washer and dryer would have been great.
2) The mattress was rock hard. Literally. It makes sense since Koreans, in general, prefer a firm surface for sleeping but after 6 nights, our backs were screaming. It might be nice to have the option of a softer mattress topper if needed.
3) It isn't possible to get anything other than coffee, tea, or water with the included breakfast. That is probably not an issue for most people but, personally, I don't drink any of those things so having an option to purchase juice or a chocolate latte would have been welcome.
Overall, we LOVED our stay and will return!!