We loved our stay at Olivier's! The apartment was clean and modern, and it was a short walk to Old Quebec and all of the main attractions. There was a grocery store near by, and a convenient store right across the street. So many restaurants within walking distance as well. Street parking was a bit of a challenge, so we chose to park at a close by underground parking which was about a 5 minute walk for $20/night.
The only thing I wasn't crazy about (by no means a complaint), was the staircase to the second floor. It was a little steep, so be careful if you're traveling with little ones. Just keep in mind that it's an old building so it just added to the charm. We would definitely stay again.