Been to a couple of hotels in Nha Trang, would say Amanian is the better one.
Rooms are greatly designed, clean and comfortable bed, nice bathroom with hot water, you have all you need in the room.
The hotel itself has a lot of guest due to its popularity, and probably because it might be the best option you get in Nha trang. Too many people which sometimes is quite annoying when you want a relaxing and quiet break. Cause some of the guest can be inconsiderate.
There's 3 pools, all outdoor, it's too cold to use if you come in December because it will keep raining and the weather is too cold. But they are really beautiful. The beach and sand area is exceptional, very romantic listening to the sea.
The breakfast is just above average, I wouldn't say it's excellent. However, a la carte menu is basic.
All in all, it's worth the money. Would just avoid coming in December. (Again, there's too many guests)