The hotel is quite outdated though it made up in its location and cleanliness. The room is quite spacious for our stay (2 people) with 1 queen bed and 1 twin bed. Noted that the room comes with a tiny fridge which is hardly keep anything cold and there is no iron for your clothes in the room. Hence, if you wish to do so you will need to walk to the other side of the premise and access a shared room where they keep the iron and iron board for all guests to use.
Also, it worths notice that the staff is not very fluent English speaking and some of them are not quite patience/helpful in our experience.
In addition, it's very difficult to get around if you plan to stay for a while. In that case, I would suggest you plan ahead and rent a car to get around. There is ONLY one taxi company in town and they are overloaded. We tried to order the cab once and they didn't even pick up the phone that tells you how that could be troublesome.
Overall, Santa Marinella is a very peaceful and lovely place to visit but since it's not yet tourist friendly, you should definitely do your research and plan ahead before coming to visit.
Hope that my experiences help you somewhat to get better experiences of your own.
Happy traveling,
Quan Nguyen