Stayed for two nights while on business. All staff members are very courteous and also helped arrange my day trip to Mount Fuji.
Hotel rooms are large and comfortable with a big bed, nice linen and good pillows. The bathroom was also large with a shower and seperate bathtub. Complimentary toiletries and towels aplenty. The room also had an ironing board and iron which is useful as you don't have to wait for the front desk to bring one to you.
The food was nice and locally produced beer and fish is high on the menu. Room service was prompt and courteous.
The room does ahve a flat screen TV with a DVD player but a slight lack of English channels (limited to BBC News and CNN i believe). There are also no international plug sockets. although one adapter is already in the room, when most people will have two or three devices, take another adapter with you.
The only down side to it was the location. the closest station is Ebisu which is on the JR Yamanote Line (circle line to all the main stations in Tokyo). However, there is a 7 minute walk to the hotel through a covered walkway with travelators. With luggage this would not be ideal. There is the Ebisu Garden Palace right on the doorstep of the hotel which has restaurants and some drinking establishments and a post office.