Check in is at main tower, but staff will help to bring the luggage over to the room at garden tower, no hassle.
Great location, as garden tower is super close to Akasaka Mitsuke and Nagatacho station; convenient in accessing many attractions. Across the street, there are many food options near Akasaka Mitsuke station. There is a supermarket nearby too and family mart just at level 2 of building, so very convenient.
There is a Rose garden and Japanese garden in the hotel. The room size is super good too compared to Tokyo standard.