I stayed at The Strings in May 2012 on a business travel. The hotel itself is great, rooms are extremely clean and spacious (for Japan standards the size is very good), nice views, internet speed is outstanding, toiletry is high quality and I can keep going.
Breakfest was very good and it's served in the lobby area.
It's very close to Shinagawa station, so you can get to virtually everywhere within Tokyo.
I know this hotel is expensive, fortunately in my case, the company paid for it, but I assure that it is well worth it.
The area is full of offices, so you'll have lots of bars and restaurants.
On thing that I must say is that I had a problem with the shower, spoke to the front desk about this, and in a matter of minutes I had a guy from the hotel apologizing about the inconvenient and in the meantime, 2 plumbers were fixing the shower. So in 10 minutes, the issue was solved. Customer Service is excellent.
I really recommend this hotel.

We stayed at The Strings for 4 nights in December 2012 and were absolutely overwhelmed by the kindness and helpfulness of the staff. The concierge was especially helpful in helping us locate a shop which sold a particular item and made numerous phone calls on our behalf which resulted in a successful purchase. The location is perfect as anywhere can be accessed directly from Shinagawa station which is adjacent to the hotel. Our room was a complete bonus as we were in a corner room with wonderful views of Mount Fuji and beautiful sunsets. I would definitely stay at this hotel if we visit Tokyo again. Thank you The Strings!

Great location, great staff, great rooms, great introduction to Tokyo! The room was lovely - spacious, great view, huge bathroom. The Club Level welcome gift of fruits, treats, and wine was a great way to start the trip. As has been mentioned in several reviews, the Concierge team made the difference in our stay. We did minimal planning before arriving and Ben Johnson, the manager, was instrumental in directing us to the right places to go. The location by Shinagawa is very convenient - and there is a lot to see just walking around outside.

The Strings is just above and next door to Shinagawa train station, which is one of the stops on the Narita Express, making this hotel wonderfully easy to get to from the airport. It's a major train station, so you can get to almost anywhere in Tokyo from Shinagawa, and there are some pretty good restaurants and attractions nearby, such as the Sengakuji Temple where the 47 Ronin are buried.

The hotel is beautiful, with a tall open atrium, lots of dark wood, and the restaurant in the center. The breakfast buffet is both large and varied, and the food was very good and fresh. The rooms are very large for Tokyo, and quite western/modern, very comfortable for at business traveler, with reliable internet access, big shower, and comfy bed. The room, like the entire hotel, was spotless.

However, what sets this hotel apart is the staff, particularly Mr. Johnson, the concierge. He's originally from Australia, and so speaks flawless English of course. His knowledge of Tokyo is extensive, and his customer service skills are among the best I've ever seen in all my travels. In my case, he went so far above and beyond normal duty that if I ever have cause to hire a personal assistant I'm going to use him as my model, as I will when I'm in a position to help someone else. After all, a hotel is more than just a bedroom, bar, lobby, and restaurant - it's the people with whom the traveler interacts that make the experience what it is.

I will not hesitate to stay here again when next I'm in Tokyo.