First hotel in Viet Nam for me, so take it for what it's worth.
Ca Ty Muine is a mixed bag, I would give between 3 and 4 stars rating, but feeling generous today so 4 it is. Considering that it's not officially a 5 star hotel, but still, certain standards must apply. So I rate it 4 stars as a 4 star hotel, not 4 stars comparing it to a 5 star hotel.
On the one hand, the hotel has a nice sand beach, although beware the rocks, both under water and on the surface, really nice and well-maintained territory with lots of picturesque places for photos, lots of flowers, well-kept lawn, ponds with Koi fish, lots of showers, good pool for adults and kids (although the water is quite cold, but that's SE Asia for you), decent and cheap bar (great milkshakes which are called smoothies for some reason), friendly personnel, decent interior, Okay rooms, decent rest rooms, a massage SPA (haven't tried), scooter parking, free safe in the room, good air conditioner, restaurant with an absolutely stunning view of the sea, enough lounge chairs and shade umbrellas around the pool or close to the beach.
On the other hand, the food is below average (poor choice, few fruit, cheap tea and coffee, chicken and duck have more bone than meat in them), some infrastructure is broken or closed (the entry to the beach is shattered, you literally need to jump over the rubble to get to the sand, the boat house is closed, some fountains are not working, the pool is shedding tiles like a cat sheds fur), the beach is dirty and not cleaned regularly, cleaning is also not the best (somehow our floor became dirtier over time even though cleaning took place every day) and the location is not exactly thrilling (but then again, this is Mui Ne/ Phan Thiet we are talking about, so DYOR about the area). While staying there, all of a sudden the palms started dropping twigs from 30+ feet above and it narrowly missed a guy walking by. After that, what seemed like the entire staff started to gather to watch and discuss something and shortly after, palm tree cleanup commenced. They were cutting off dry twigs which would probably start dropping soon. Yikes. That was an oversight on the staff's part.
The hotel is located on the Nguyen Dinh Chieu street and this street is your lifeline to anywhere. You have a choice between going left or right - and that's it. The hotel is a little out there from the main touristy part of the street, you need to walk around 15 minutes towards Mui Ne to reach it. Renting a bike recommended especially for longer stays. The market is very far to walk. Although restaurants, pharmacies (aka money exchanges) and small shops are readily available all over the street.