We just flew in from Osaka and originally was booked at another hotel (very disappointing) but ended up moving to Mitsui Garden Hotel Prana Tokyo. Hands down the best place to stay in Tokyo (especially if you're going to Disneyland).
We booked a room that had 4 twin beds. Amazingly spacious and well equipped. The toilet area is separate from the shower area. Shower was Japanese style with excellent water pressure! Mini fridge, great wifi, charging cords for your phone, kettle for hot water to make tea, I also used it for my cup of noodle, they even have a foot massager!
They have a Lawsons in the lobby. The restaurant is outstanding! Best breakfast since we've been in Japan. Oh yeah, they have ice and water machines and washer/dryers on the floors (west wing)
Overall rating 10 stars!