The Cerulean Tower Hotel is in probably the best location in Tokyo for tourists. Very close to Shibuya station.
The hotel itself is very nice but maybe a bit bland. The staff of course are very polite and attentive but we usually stay at the Hyatt Regency and I prefer this hotel but of course the location is not quite as good.
The rooms are comfortable and relatively large with beautiful bathroom. The beds are on the hard side, the view is magnificent. Immaculately clean.
I will say that it is a little noisy at night with thumping and bumping from above a little annoying.
Overall though you would have to be picky to not enjoy your stay at this hotel.

We stayed at the Cerulean at the recommendation of a work colleague and if we hadn't stayed at the Hotel ICON in Hong Kong only a few weeks earlier then my review may have been very different. We booked a room on the executive 'Cerulean' floor which included breakfast and access to the lounge. I would recommend this as it is nice to have the extra facilities inclusive. The service was excellent and the staff were very attentive and polite. The room was clean and I believe large by Tokyo standards but for me was a similar size to a standard hotel room in other major cities around the world. The bathroom and shower were excellent and the whole hotel was spotlessly clean. As I mentioned, the let down for me was comparing similar facilities between the ICON and Cerulean but the ICON just managed to go one step beyond in terms of service of what the Cerulean offered. Both had breakfast included but the ICONs spread was a buffet and also full service and was a much larger selection rather than a small buffet. They both offered afternoon tea but again it was full service at the ICON rather than serve yourself at Cerulean etc etc. I don't want to keep comparing in this review as what is on offer at Cerulean is excellent but for me I only recently had better in Hong Kong.

The bed was very comfortable and of course the location of the hotel is superb right in the middle of things. If you wish to travel by public transport the station is only a short walk away but as with all Japanese service, the hotel are most efficient at organising a taxi should you prefer.

All in all I would recommend the Cerulean but just be aware that other than attentive staff you are getting quite a bland corporate 5 star hotel rather than a hotel with huge amounts of character or a hotel that really does go above and beyond.

I just spent a week at the Cerulean Tower and was very impressed with the stay. The location can't be beat (3min walk to Shibuya Station) and the views are fantastic. There are multiple restaurants in the hotel and an amazing bar on the top floor. The gym equipment could be updated but there was never anyone else in there when I went to work out. The pool and jacuzzi are enormous and were also empty when I visited. My bathroom wasn't very large but I did like the size of the rest of the room, especially the walk in closet. They also provide a variety of pillow types so you can mix and match to your liking. The breakfast buffet was nice ($33USD) and as a westerner I appreciated their inclusion of french toast, pancakes, & fresh squeezed OJ. There is also a convenient 7-11 practically within the hotel lobby. I'll definitely be back.

Whenever we go to Japan, this is the place to stay for the service of course we are in Japon...!
Magnificient view from the roof top bar over Tokyo. Very well located next to train and subway station.