AMAZING stay! This was my first Airbnb experience, and I have to say it won't be my last. The loft was clean, convenient, and EXACTLY as pictured and described. Pelletier was a most gracious host, and kept in contact throughout our stay--I don't think I ever waited more than 5 minutes for a reply to a text. The loft is located about a 15 minute walk from Old Quebec, and you have the option to explore shops, cafes, and small restaurants on your way down St. Joseph's St., which is right where you are located. I highly recommend the Brulerie Saint Roch cafe, which is located a very convenient 5 feet from your door. (Amazing ham & cheese croissants and mocha lattes :) Caffe Roma is also right down the street, another hidden breakfast/brunch gem.
As for parking, unless you are familiar with the French language and the area's signage, I would recommend parking in the garage right across the street. The rate is $15 CAD for 24hrs (aka around $12 USD), which was worth the price for our brief stay.
And while we did encounter some (very minor) setbacks (i.e. we were unable to close the lockbox upon our arrival, wifi was iffy, and note that you cannot use the AC and hairdryer in the loft at the same time, or it will cause a power surge!), Petellier was a great communicator and provided us with advice to get us back on track. As for the wifi, plenty of shops and cafes provide it around the area, so it was not a problem. :)
10/10 would stay here again & would recommend to a friend!