We stayed in the Hotel Fesch for one night, ready to catch our ferry back to the mainland. We had a family room for our family of four with two children aged 9 and 7. There was a double bed with two singles.
The hotel was very centrally located, a very short walk to the port, and not much further to the train station. The street is one of the main shopping streets of Ajaccio, with good restaurants and souvenir shops.
The hotel itself did appear very tired. Although the bathroom had been recently updated, there was no standing shower, with only a shower head over the bath (and no curtain). The room was a decent size, with a fridge, and had a good internet connection (once you asked for the password).
The hotel was happy to store our luggage for the day before our evening ferry.
It was perfectly adequate for what we wanted, but for the price, I expected a slightly better room.