I stayed at the Odaiba Hilton in November 2015. I was pleasantly surprised. I checked in around 7PM which was very quick and efficient. I was told that the executive lounge was not yet open. They gave me 4 drink coupons, which were very nice as they did not restrict the drink to some cheap well drink. I thought the room was clean, with a very large bathroom. The buffet breakfast the next morning was great as it was not limited to a continental only like most properties. I had a flight out of HND that afternoon. They had a bus service which cost 520 yen, it did however stop at a couple hotels before getting to HND.