I actually was there for a business trip to Nagoya. Stayed in the hotel for almost 5 days. I was given a high floor room with an excellent view of the town. Loved the room size, the bathroom and everything..
The train station is just below the hotel. There are many good restaurant option in the hotel and nearby as well. It is indeed a little tad expensive to stay here, but its worth it.
They have a huge shopping malls in the first few floors of the building.. so all in all a very decent place to stay.
The staff was very attentive.
Breakfast was great.

We stayed in Nagoya for one night only with our two little children. Rooms are large, modern and nicely decorated with a fantastic view across the city. The hotel is directly above Nagoya Station which makes is easy to reach.
Service was excellent with nice breakfast buffet. Dinner in the Japanese Ka-Un restaurant was superb and they even managed to create a several course vegetarian Dinner menu for my wife although not offered on the menu.

Crazy expensive for a tiny room (by western standards): 13000 yen per night for single occupancy but then my wife decided to join me last minute. For the exact same small room i would have had as a single, we had 2 people staying at a rate bumped up to 22000 yen!

Hotel is very nice and luxurious from the decorative and glamorous lobby that is connected right to an office tower and across the street from a high end shopping mall with loads of restaurants and bars nearby. But really not worth the value equation... Really you are paying for the convenience of a hotel that is connected to the Nagoya train station. The 22000yen fee for us did not even include breakfast, and use of the fitness center would have been an extra 3000yen. My reco is to save the cash and book a place where you might have to walk 3min farther from the station.