I can't speak for the Sheraton but I enjoyed the Hilton and would have no reservations about staying there again. We were in a park view Celebrio King room -- nice, clean, spacious... Very spacious, actually, by Japan standards. The staff was pleasant. The breakfast buffet had a wide variety of options. We took advantage of that in the mornings and then hit up the convenience store just off the lobby when we returned at night after the parks closed for snacks and drinks. There's a shuttle running every few minutes to Bayside Station, although, the walk is so short we ended up doing that most of the time instead.