The Oriental Hotel Tokyo Bay has many great features but they also have many low points that they can improve on.
First, the postives:
The location is amazing for a Disneyland/Disneysea visit. It's steps away from Shin Urayasu station which also has 3 malls attached to it (Atre, Mona, and Aeon). All 3 malls have a wide variety of shopping and dining.
The room we stayed in had 4 twin sized beds (the two middle ones were pushed together to create a king), and there was space enough for an additional rollaway bed and a sofabed, comfortably sleeping 6. We stayed as a family of 3 so it was more than enough room. The room was very clean and well renovated, with a standard Japanese style bathroom (wetroom bathtub/shower, separate toilet).
The hotel offers a shuttlebus service to Tokyo Disneyland and Disneysea, and we never had to wait more than 10 minutes for the bus during peak hours.
In terms of amenities, the Oriental Hotel Tokyo Bay offers a complimentary "lounge" in the lobby area (more about this below), business hotel style amenities to take to your room (shower/bath kits, coffee and tea, etc), self-serve storage, and an interactive kids projector show/game (also located in the lobby).
Now onto some of the improvements that the Oriental Hotel Tokyo Bay can work on..
Let's get the big one out of the way: the lounge. It's completely unsupervised so guests are often very selfish or act inappropriately. We witnessed one guest help themselves before the opening time to dozens and dozens of cups of nuts, picking through and taking all the hazelnus, cashes, almonds, and only leaving peanuts before anyone had a chance to try the lounge. We saw many kids licking the serving spoons, coughing in the cotton candy maker. There's no staff checking guests so literally anyone can walk into the lounge to help themselves (not sure if this is intentional). The quality of the snacks was very so-so. We had actually booked a lunch at the hotel, but after seeing how the lounge was managed, we cancelled our lunch reservation as we were nervous that the restaurant quality would be similar to the lounge quality. It was a very nice treat to have self-serve beer and sparkling wine, but we felt that the behaviour of some of the guests ruined the experience.
The other soft products had similar room for improvement. Check-in service was incredbily slow, taking 30 minutes despite our family being Japanese fluent. The exchange rate used at the hotel was staggeringly off-base (at the time of writing, it was $1CAD to 109YEN) but the hotel offered 102YEN somehow.
The guest amenities room was also completely open to the public, so people would rush in at 2PM or earlier and take EVERYTHING. The quality of the soap, toothbrushes, body towels, toothpaste, and other products were extremely low quality.. perhaps to offset the selfishness of some guests. All in all, the quality of these amenities and how they were managed reminded me of a typical business hotel.
The building itself is quite old, with extremely dated elevators. While the pictures make the hotel seem bright and lively, in actuality there is very little natural light in the lobby.
Despite these minor shortcomings, The Oriental Hotel Tokyo Bay offers incredible value, location, and rooms; especially for young families with Tokyo Disney Resort itineraries.