Eris apartment, located near "Akabane" Station was perfect for me and a friend to enjoy our stay in Tokyo. Leaving Akabane station through the north gate and walking right immediately gets you to the apartment within ten minutes by walking. Once we figured out the way, we didn't even need a map to find our way back to the apartment. The area is quiet and a few stores line up in the street. Vending machines are found everywhere and nearby there's a laundry as well. The apartment itself offers a washing machine as well.
The checkin-process was easy and we were able to get into the apartment without any issues. The apartment was super clean and the provided bed sheets were already set up for us. It's a lot of room for two persons, so our luggage didn't get in the way in any kind. We used the fridge for our groceries which needed to be kept cool and didn't use the microwave - but there's one, in case it's required.
A downside of this apartment is a missing sink in the bathroom or in the shower. The only sink is within the kitchen. Not a big deal, but you have to get used to wash yourself in the kitchen sink. During the cold season, the apartment might become a little cool due to the bad insulation - but this is totally normal for most japanese buildings.
It's nice to be provided with a portable internet router. In case it's needed, just plug it out of the charger and take it with you.
We enjoyed our stay at Eris apartment a lot and will definitely come back on our next trip to Tokyo.