I had an excellent stay!
The apartment is spacious, the beds are comfy, and all the amenities you need are there: bath soap / shampoo, dishes / silverware, towels, washing machine / detergent / tools to hang the clothes. I also worked remotely from this apartment and had absolutely no issues with the internet. Finally, the apartment was very clean!
The location is also great, with a Lawson conbini in the same building, and only 3 minutes away from the Sumida riverside park - great for runners!