We stayed here with 2 adults and our sons, 12yrs and 14yrs for three nights. The location is excellent for visiting Senso-Ji and I recommend going there both early morning and the night time for a different experience. The old streets of Asakusa look great at night.
As for the apartment, it was as pictured, a very small area for eating but very clean. The beds are firm but we slept well. The road noise is noticeable at night but it quietens down as it gets later.
I saw a few other people had issues with changing the PIN on the door lock. You just need to hold down the ST button for longer.
Overall a great place to stay in Tokyo.