If you’re visiting old Quebec, it is worth spending a bit more to get a nicer spot with on-site employees and functional services.
Our AC did not work, and the attendant was unable to fix it. Then we thought we fixed the AC, but despite the unit beginning to respond to our remote, it did not actually blow cold air. It takes half an hour for them to arrive on site after hours (after 7pm), so you can imagine the inconvenience if you require assistance. This is why we will pay more and stay elsewhere next time.
Btw there is good public parking just a 14 minute walk away at GESPARC, which is in the same parade used by the Hilton. We were lucky to find parking there on a busy Saturday night.