Just like its description, the apartment is brand new and located in a quiet residential neighborhood, just minutes away from Skytree, its mall and the train station. In the 3 nights we stayed, we did not hear our neighbours even though we knew there were people staying in the apartment next door. The decor is simple but chic, the room looks small but there is quite a bit of wardrobe/cupboard/cabinet space to put away your clothes, food and toiletries. The washing machine-dryer is wonderful and so is the shower and bath unit. I didn't use the pocket wifi provided so can't comment on that. My son and I really enjoyed our stay here and we are looking forward to going back in a few days' time (we are now visiting friends in Toyama). As I am petite and my son is only 4 years old, I feel that space-wise, it is really adequate for us, and I'd also recommend the apartment to individual travelers and couples.
Do follow Aileen's directions closely (1st parking sign is green and 2nd one is blue) - it may get confusing if you take a wrong turn, especially if you arrive after dark. The walk is rather easy with wheeled luggage as there are elevators and roads are flat all the way.