I have stayed in this APA Tokyo Bay Makuhari many times since 2017. Recently, I stayed 5 nights total on both sides of my 32 day trip.
I appreciate the bus to/from Narita (1,000 yen) that drops you right at the front of the hotel. I appreciate the attentive and wonderful staff, most of whom speak simple English.
I appreciate the morning and evening spas (Japanese onsen style), that are fantastic to start and end the day with.
location is next to Makuhari Messe convention center, which works well for me for the event that I attend each year. It's a bit far of a walk to the JR rail densha eki, but it's doable with wheeled suitcase. There is a small, wonderful Japanese garden next to the hotel (100 yen admission fee). The Tokyo bay is right there.
There's also a wonderful breakfast (asa gohan) buffet that is definitely worth the money.
The rooms are older, but spotlessly clean. This is a "flagship" APA, I think. Unlike other APA hotels I have stayed in. Try to stay in the tower for the views.