We stayed two nights in early October and thoroughly enjoyed the experience.
The hotel is on the sea front overlooking the marina and close to the bus and train stations. The entrance is well marked as you walk along the arcade in front of the buildings in via Roma. As you enter you are faced by stairs and a lift with no obvious instructions on how to reach reception. The lift arrived but the door doesn't open without a key. Climbing the three flights of stairs (minus luggage and wife) I found reception and was duly given a lift key. And told there is a bell-push by the entrance to summon reception staff who will look after you and the luggage! Obvious really.
However, the room overlooking the marina was roomy and very well furnished in 30's style. It was slightly jaded in appearance but this really added to the charm. Some floor tiles were loose and there was a fresh water leak in the bathroom, which was dealt with. It had all the facilities you'd expect of a 4-star hotel, except tissues in the room/bathroom, and had a large television accessing mostly international news channels.
Staff were very helpful and informative, giving us a guide to the town and pointing out all the sights and points of interest. (It's worth noting that many of the attractions are only open in the morning after the summer peak.) When we had a query or issue they were only too pleased to assist.
Breakfast is excellent: plenty of fresh fruit, cereals, good breads and pastries in wide variety. It's served in a small reception room overlooking the marina.
There are many, mainly mediocre, restaurants in the road running parallel to via Roma behind the hotel and the castle area is an easy walk away - plus a lift ascent.

Very pleased with this hotel. Lovely room with everything that you would need. Perfectly situated on the sea front and the staff were very helpful and friendly. Recommended for a stay in Cagliari.
Reasonable rates, well worth the money.

Fantastic service and staff! cocktails in the lounge are excellent and they made our dog welcome too.
We arrived by boat and they even came to greet us in the Marina!
gave us excellent recommendations for restaurants in the area!

A wonderful hotel, beautiful rooms, the common spaces are warm and beautifully decorated like you are in someone's home. Staff are very friendly with great suggestions for non tourist restaurants and places to see...would definitely stay here again!