Quite mixed. Depends what's important to you. I stayed for 2 months.
Pros:
-Amazing location, super close to metro, super close and walkable to a ton of delicious restaurants and cheap grocery stores
-Big by Japan standards
Cons:
-It's noticeably loud, there are constant train noises until past midnight. I always slept with earplugs and it was fine.
-It's not 2 bedroom as advertised- it's 1 bedroom (tatami) with two beds in the living room. There are no chairs. There is a desk with like a circular table you can sit on, it's too high and not comfortable (I bought my own chair)
-Rather dirty- half the dishes weren't washed, the drawers under the bed had dust, hair, and cigarettes in them, the fridge shelves were broken (I admit I did not tell the landlord and I just cleaned it instead)
Overall I enjoyed it but wouldn't stay again for the price. It's very hard to find larger airbnbs in central Tokyo, so options are limited. I stayed here as I didn't have other options.