The loft is truly a dream, exactly as pictured and described. Right in the heart of Old Port and within walking (and biking--check out Bixi) distance to all of the downtown neighborhoods and beyond. The loft is a wonderful blend of old and new: historic architecture meets modern convenience.
Everything required for a long weekend was thoughtfully provided. A binder offers information on many essential needs, there are numerous travel books in the loft and Missy's AirBnB virtual guidebook provides some great suggestions for things to do nearby.

There are numerous parking options nearby if you are driving into town. The Marriott SpringHill Suites, a block away, is $20CAD/24 hours for indoor, underground parking--make sure they know you aren't staying at the hotel (or it's $24).

There is WiFi in the loft, but don't rely on it for streaming (VOIP). Most cafes and some areas of downtown have open WiFi. You can download an "Offline Area" in Google Maps which can be helpful to navigate when WiFi isn't consistent. If you're coming from the US, check with your cellphone provider as they offer packages for Canadian travel which are very reasonable. The Bixi app worked in airplane mode, providing current location, where the next bike port was located and where dedicated bike lanes were available.

As mentioned, Saturday night is lively and loud in this area, so be prepared (earplugs were kindly provided). There are nearby clubs with loud music into the wee hours and some neighbors in close enough proximity who kept the party going well into Sunday. If you're staying Saturday night, pick up a bottle of champagne to enjoy before bed--and use those earplugs, just in case. Sunday and Monday nights were quiet. This is an old building with old windows and a lot of (lovely) granite buildings in close proximity--sound carries!

Cirque Du Soleil is in town on the pier, less than a 5 minute walk.
The Basilica is within 10 mins walk.
The Botanical Gardens and BioDome (both highly recommended) can be biked in a little over an hour and Downtown in about as much time. The walk to Mont Royal, stopping at Fairmount Bagel along the way, is about 90 minutes. If you have the time, walk/bike to experience the surrounding neighborhoods which you would otherwise simply drive through, overlooking some great cafes/lounges/shops.

Missy was a great host, quick to respond and very accommodating. I'd recommend this loft to anyone looking to visit Montreal.