Yanaka SOW was a great stay. Some locals consider Yanaka quite far out of Tokyo, but being a 5 minutes walk to the Yamanote line means you can get almost anywhere in central Tokyo within 30 - 45 minutes in a fast, easy and safe manner.
The local area is beautiful. There are a lot of graveyards around if that makes you nervous (Yanaka is famous for them) but they are beautiful. There's a million cafes, galleries and eateries, and Yanaka Ginza is very close by. The area feels like Old Tokyo, or a bit like Kyoto in place.
The rooms themselves are great. Clean, well presented, and with plenty of space and facilities. Having a washing machine in the building is super handy for a longer trip too.
Your room isn't cleaned during your stay except for special requests, but it was fine for us 10 days later. The check in machine was broken but their staff member sorted us out very quickly.
It's a beautiful building and area, well recommended.