Our stay wasn't great but not horrible either. The place was clean and the hair dryer, A/C, water heater, stove were a plus. Also, we have a view of the sakura trees in the neighborhood from our window, which is again a plus.
When we arrived, there was a mix up with another couple. They arrived an hour ahead of us. They thought they were supposed to be in our room. Sei replies to messages on air bnb very quickly so we were able to sort it out right away despite Sei not being there. I saw them using the lower bunk beds. So i do understand why the sheets in the lower bunks smelled like those were used. However, the sheets on the top bunks smelled too. To be fair, they offered to change the sheets that we opted out of.
There were bath towels too but they smelled of cigarettes so we didn't use those.
The apartment does not have any elevators. So if you will be bringing luggages with you, request to be assigned on the lower floors.
Also, the water heater was a challenge to use at the beginning but Sei wrote down detailed instructions on how to use it, making it easier to set up.