This is a wonderful apartment to stay in! The building is old enough that it has fascinating quirks and charms, but the apartment itself has tons of modern style and convenience. The location is also great, in a charming neighborhood but with a nearby bus stop that provides access to downtown and lots of coffeeshops, restaurants, etc. within walking distance.
While these aren't downsides per se, I would note that if you have mobility issues, there's quite a few stairs to climb to the front door and the bathroom has a high-walled clawfoot bathtub. Light sleepers might also want to be aware that the apartment is on a busy street, so you'll definitely hear some traffic.