I had a great stay at Marc's place. I was in Quebec City for a French course and Marc was nice enough to try and speak some easy slow French to me so I could practice. The room was cozy and had everything I needed. Great location in Quartier Saint Sauveur, there's a lot of nice cafes and restaurants just down the road and it's a short walk to the very hip Saint-Roch. A bit further but still walkable to the tourist sights in Vieux Quebec.
Just a note on parking. There's free street parking but it can be difficult to find a space at certain times of day so might get annoying if you have a car that you're planning on using a lot. If like me you're just arriving by car and need somewhere to leave it for a while then it's perfect.