Just returned from Brugge with my wife. Paid a total of 300Euros for Eurostar from London and two nights here.
Very clean hotel and a nice breakfast. Hot bacon, eggs, vast selection of cold meats, bread, jams etc. The location here is great for all sights. No more than a 15 minute stroll to most attractions and still quiet in the evening. The only sound we heard in our room was the church bells at dusk.
Definately recommend it, but I would say its not a 5* hotel. Still, very clean, friendly staff, cant fault it.
Old building and probably needs a lick of paint to smarten it up a bit but Im just being a bit fussy and letting people know. I would stay again, and if you've never been to Brugge before the location is great.

We stayed in a lovely charming room on the first floor.
Excellent gourmet restaurant with friendly people.
We recommend this hotel for a 100%.

Be careful: The Hotel De Castillion puts very attractive offers on its website. When you try to book them, the booking system suddenly shows double price or more. When you send an email complaining about that, they tell you it is your fault and you misunderstood the price.
This ist not the way a 4 star hotel should act.

Stayed in early Jan. Good points are the location and the Art Deco lounge which is small but very impressive. Previous reviewers mentioned that the rooms were small so we paid extra for a deluxe room and were assigned room 3. This room was at the end of a dark shabby corridor with artex walls and no natural light and past the kitchens. The room was 'shabby chic'. Very traditional style but very tired. The floor was wooden block that needed restoring, the bathroom was straight off the bedroom with no working extractor fan!! Shower was not facing the length of the bath but across the bath, needless to say the water went everywhere. Sheets were thin and worn but towels were plentiful and very clean as was bathroom. Service was not proactive. The reception was never manned but once we found a member of staff they were helpful. Restaurant was closed to end of Jan. Breakfast was poor. The first morning there was scrambled egg and bacon but the next morning there was neither as ' there were only two people staying at the hotel'. After making the point that we would like what was served the previous day the girl went to make it without complaint. This hotel has a lot of character but is really just a three star hotel. If your expectation is three star you will probably not be disappointed