Had a very nice, one week long stay at this hotel. It was much better than expected. Clean, professional, well organized. The room, although looking out towards the busy railway station, was very calm, the windows having good soundproofing.
With regard to other reviews: Wifi is now available in all rooms without surcharge. You'll get a little wifi router upon request at check-in, and just plug it in in your room. Works like a charm.
Also, the breakfast was fantastic, with a huge selection of both japanese and international food stuff of good quality.
Best of all: The hotel has its own little onsen in the 4th / 5th floor, consisting of a thermal bath and a sauna, and it is free to use for the hotel guests.