We stayed here from Nov. 4-7 and then again on the 11th before heading home. The pluses: our room was clean, the bathroom was very nice and we were placed near the elevators in the New Tower. Also, the hotel had onsite shopping, a convenience store open late, and they held our bags for free after we checked out so we could go sightseeing before leaving Tokyo.

The minuses: For some reason, our travel agent had booked us for a twin room. When we asked for a double at check-in, they were unable to accommodate us. I found out later that most of the rooms in the new tower are twin rooms. Normally, this wouldn't bother me except that we were paying $172.00 US per night for a twin room.

We could not adjust the temperature in our room. It was a bit warm and the air-conditioning did not work well.

The Shinagawa location was great during the day, but the whole area was pretty lame at night. Maybe if we had gone to the other side of the station, we would have seen more, but instead we hopped on the Yamanote line and went up to Shibuya for entertainment.

Overall, I was disappointed with what this hotel provided considering the price. Next time, I will spend less and stay in a smaller hotel. In the past, smaller establishments have been more accommodating and can offer more personalized help to international travelers.

My wife and IS tayed at the Prince Hotel in Shinagawa for 3 nights for 11,500 yen (no breakfast) which I thought was a real bargainf or typical Tokyo prices. We were pleasantly surprised by the ammenities and proximity to the Shinagawa station which is a major station in Tokyo offering Shinkansen, regular JR Lines and subway access. The room was decent, a little outdated but otherwise very clean. I would definately recommend this hotel just for its closeness to the Shinagawa station. We hopped around a lot so access to the Shinkansen was helpful. When you pass the turnstiles for the JR Line or Shinkansen and are in the main corridor, you will see signs that point you towards the exit for the Prince Hotel. Once you're out of the station, you just need to look up and you will see the sign for the hotel. Make sure you get a JR Rail pass if you plan to visit other cities like Kyoto.

I will start with the most important information. I stayed in the NEW TOWER, in a room with TWO SINGLES.
The view from the room was out of this world! full panoramic window, on the 33rd floor, looking way out over shinagawa station and the new buildings on the other (south) side of it.
the room was good, not luxurious, but clean, simple, nice, and a good size for a tokyo hotel.
the best thing, of course, is the shinagawa area. there is lots to do, it is convenient to everything, and the shinagawa prince has all kinds of stuff just on the premises (bowling alley, movie theater etc)
Definitely go to the other side of shinagawa station and hit some izakayas (japanese pubs) and have some good japanese beer and pub food.

I stayed in the Main Tower of the Shinagawa Prince in April. I chose this hotel because of its proximity to Shinagawa station (convenient for both Shinkansen and JR Yamanote Line) and also because of its swimming pool.

I assumed that the pool would be free to guests, however you have to pay 1000 yen (about £5) each time to hire a towel. The internet cafe was also an attraction but you have to buy at least a cup of tea (500 yen) before you can use it.

The room was small and dark with a small slit of a window. Although it overlooked the station and a busy street, it was quiet. It was my fifth visit to Japan and the smallest room I'd stayed in. It was supposedly on special offer at 9700 yen per night excluding breakfast - more expensive than most of the hotels I've stayed in in Japan. The lack of breakfast is not such a problem as there are several coffee shops in the station where you can buy a 'morning setto.'

The public areas in the hotel are spacious and very nice and the staff are helpful. I would definitely stay in Shinagawa again but not at the Prince.