Located right on Boulevard Honore-Mercier, and a block from Rue St. Jean at the entrance to the old town, you cannot beat this location. Parking was provided in the garage, and getting in and out for day trips outside of town if super easy (we went to Montmorency Falls, Sainte-Anne-de-Beaupre, Cap Tourmente National Wildlife Area, and Parc national de la Jacques-Cartier - all within a 30min drive).
The build is modern and clean (only a few years old). While technically it is a condo building, nearly all of the condos are rented out to guests that visit so it acts almost more like a small private hotel. There is a 24-hour concierge in the lobby, with fob-keyed access to all outside doors at all times. It's very secure. The front-desk is also very helpful with trip suggestions and gave great advice for the places to visit outside of town that I mentioned above - in particular, the national park was fantastic for hiking and boating.
A brisk walk to the Frontenac takes about 15min, much longer if you meander through the shops on Rue St. Jean. There is a coffee shop right outside downstairs, and a small grocery several doors down. The apartment itself comes with complete kitchen and accoutrements so you could easily eat every meal in if you wanted to (though it would not be as much fun, as there are plenty of great restaurant choices so near by).
Amenities were plenty in the apartment - plenty of towels, extra blankets. Balcony looking directly NW (great sunsets), dishwasher, full size refrigerator, and full laundry with washer and dryer. Also to note, the shower is fantastic.
Note that the garage entrance is on Rue D'Aiguillon, and has an intercom to contact the concierge for the first time there. Afterwards, you receive a fob to enter/exit as often as you please.
This is the perfect weekend getaway place for a 2 people - my wife and I had a great time. I'd gladly come back and stay here for any time of the year. While we did not directly interact with Remy, he emailed us in a timely manner and we were able to get our instructions for check-in squared away relatively quickly. We loved it and highly recommend it.