I believe that in booking this Airbnb you're really paying for the location. It's absolutely superb--within a 15-minute walk of the nearest subway station and grocery store. There are tons of coffeeshops, bookstores, and restaurants within easy walking distance, and in general the area feels very safe and welcoming. The home itself, while a little messy and disorganized, is comfortable, and if you think you're going to spend most of your time out exploring the city, it's perfect for your needs. The bathroom in particular is a little grimy, but it didn't majorly hinder our stay. Bed and couch were very comfortable, and there was plenty of natural light. The view from the balcony is lovely and it's a great place to sit out on a night in and open up a bottle of wine or a Canadian craft beer. There's no A/C but there's a portable fan in the bedroom and a space heater/fan in the living room, and with the windows open it wasn't a problem at all. The PS4 was disconnected so we couldn't utilize it or watch Netflix, but this also wasn't a major issue--after all, we were there to experience Toronto.
We had a check-in issue with Justin that got resolved within a reasonable timeframe--because he was so busy, he forgot to send us a welcome message with instructions for getting a key and checking in. However, it seems this was a one-time issue and isn't the norm. I would be sure to send him a message when you reserve the place and ensure that you receive a response from him.
Overall, we were incredibly happy with our stay and felt very at home in Justin's apartment!