We stayed 6 nights - early April for Cherry Blossom. There is a shuttle to the MTR Station - Shinagawa but it is only a 5 minute walk out the back gate (we never used the shuttle). As of the 1st April 2014 - they now provide free Wifi in the room - signal strength and speed were very good. The breakfast in the Patio Restaurant is very good & reasonable value. We had a room with City View - looking at Tokyo Tower - very good. We only had 1 complaint which we did mention to Guest Relations - that was that there was a grate over a drain on the side of the carpark that was bent - everytime a car, bus, taxi, truck etc... ran over it, you go Bang, Bang - this was so load it kept us awake - If they could replace the grate on the drain - they would have earned an Excellent. For this location we can visit everywhere - Shinagawa is a main station for the Shinkansen, it is also on the Yamanote Line - the main loop line in Tokyo
1 ticket to get on and off at any of the 29 stations is Y140 or a day pass to get on and off as often as you like is Y750.
The Tokyo Morning Television Show was doing the weather in the garden behind the hotel because of the Cherry Blossom trees - they are spectacular.
The Limousine Bus from Narita was at least 1.5hrs - so be prepared for that.
But it was a great location and if we go back to Tokyo we will stay here again.