The 24 hours front desk is helpful with luggage forwarding service. They also sell shipping boxes here so it's a pleasant surprise. The free drinks bar from 2-10pm was a nice touch, though I wish it opened till midnight as it takes quite a while to return to the hotel from central Tokyo.
The building itself is nicely furnished, the room and bed is comfortable and the washroom is clean. The room is a bit small for a 3 people room, not much space between beds. The space by the door is big enough to have two large luggage open. Counter space is limited. The shower, toilet and sink are separate so it's helpful.
While it's only 7 minutes walk from the Yurikamome Line (this circles around Odaiba), it's actually quite a far walk (20 min) from the Rinkai Line (this leads to central Tokyo) so that makes this hotel less accessible than expected. It does have a shuttle that goes to Tokyo Big Sight, but it's limited to the morning only, and the pick up shuttle from Tokyo Big Sight is evening only. There is a Lawson and Ariake Garden mall within a few minutes walk. There is an airport limousine bus stop for Haneda at Ariake Garden.
If you plan to visit central Tokyo often, this is not a convenient hotel to stay at. If you plan to stay by Odaiba area and visit the Toyosu Market in the morning, then this is a good place to stay at as it's only 15 min walk from Toyosu Market, so you can get there even before the train starts running. We didn't end up going to Toyosu Market though.