The apartment is on the 2nd floor and there is no lift. It was a little difficult with luggage as well as with a baby and stroller (that we had to fold down everytime) but we knew before we booked that is was on the 2nd floor so we were prepared.
We requested a travel cot when we booked the apartment but unfortunately it was not there when we checked in at 4pm. I let the host know and they bought one to the apartment that evening. When we got back from dinner we put this up to find it was broken which was quite frustrating. We let the host know and due to it being too late in the evening they couldn't bring another one over until the next day. Our daughter did struggle to sleep that evening which wasn't ideal. The host kindly refunded us for that night's stay. We got a replacement cot the next day which worked fine.
The apartment is spacious for Tokyo and a very good price. It is also close to the metro station. I would recommend this apartment.