Had a wonderful stay at the Keio Plaza Shinjuku. Our check-in process was quick, and we got a surprise upgrade thanks to Roman, the concierge, who made our stay that much more special. The rooms were large for Tokyo standards, and the bathroom included all the proper amenities. Service was excellent, of course, and I would say of a higher standard than the Keio Plaza Sapporo, where I had stayed prior. Location is close enough to Shinjuku but still a good 10-15 mins walk to the main Shinjuku station. Overall, would not hesitate to stay again whenever we are in Tokyo.