The Sunroute is a five-star hotel with three-star prices. This hotel is FANTASTIC. Clean, modern, new, and super close to shopping, restaurants, and the Shinjuku metro line (it's literally right next door to one of the entrances).
I got a great deal with the Internet and breakfast included and it was perfect. Yes, the WIFI only works in the lobby, but my room had a LAN cable that connected to my laptop and was easy to setup.
Sunroute also has outstanding service. Each time I would go to the front desk for something (iron, etc) they would have a minimum of five people to help me. I never had to wait to talk to someone - ever. During my stay, and since this was for work, my laptop's network settings had changed and I could not use their internet. I called the front desk from my room and they were able to diagnose and fix my computer - over the phone, in perfect english - very quickly and easily. Amazing!!
And the breakfast - SO GOOD. Great selection of western and japanese-style breakfast food with, quite possibly, the world's best hotel coffee.
For work and pleasure I've had the opportunity to stay at some really nice hotels (waldorf/intercontinental/etc.) I would consider the Sunroute to be just as nice as any of those hotels.