Our family stayed while visiting the Niagara Falls region. The location was very convenient to walk the .5 mile to attractions and avoid parking fees. We had no issue with the steep stairs at entry, but this might pose difficulties for others. The flat was fine, however it was clear that the owner was staying downstairs in the building. We would make a few suggestions for improvement:
-Professional cleaning. If you're charging folks for a professional cleaning, provide one. The house is lived in with chips, fingerprints, and stickers on the walls. The bathroom walls/ceiling were dirty with dead bugs and hair.
-Heating. We visited around Thanksgiving and while it was in the 50s F during the day, it was down in the high 30s/40s at night. The only available heating was a small heater in one of the 3 bedrooms. We visited from a warm climate and the other 2 bedrooms got very cold at night for those not acclimated.
It also would have been nice to have some regular coffee for the Keurig, not just decaf. Not a big deal, as having a kitchen is really convenient. Overall, the location was worth it for any who want to be away from the hotel scene and enjoy a little walk. We also really enjoyed the suggestions for local restaurants to support outside the tourist areas.