We are french and we stayed 3x2...
We are french and we stayed 3x2 days there.
The staff were very very sympathic and friendly and we noticed they were accommodating and serious, despite we came without reservation.
By the way, they seem to talk a pretty good english, much much better than mine.
One particular day we came 6pm instead of 3pm : the staffgirl hadn't any reservation or payment, but our baggages were kept, set in our room, and the nice girl accepted a last minute change of 2 nights instead of 3, without any comment, just a smile as usual.
Very nice hotel, great location in Shibuya.