Me and wifey stayed about 8 night in Denis' place. By bus 12 you get from airport to Diamant station, about 450m from the apartment. There are also bus lines (don't remember numbers) to get to center. Very well connected area.
Huge grocery supermarket Colruy in front of apartment, and apparently very popular with locals.
Apartment is really cool and comfy, no street noise, big and functional kitchen, nice relaxing double bed.
Fully recommended!