The apartment is ok. Relative good value for money. Comfortable but very clinical and all white. No style or attention to comfort. Cheap furniture, but overall very decent. The washing machine was very useful. Decent bath and shower.
Just be warned, the check in process is absolutely brutal and takes a very,very long time. Try not to show up in the rain, because you'll be standing outside fiddling with an ancient tablet taking pictures and making video calls (yes, video calls!!) to check in. Terrible start to a stay.
The location is good, close to the chiyoda line which runs through the city. Some amazing restaurants close by.