Rik is a wonderful host! He's welcoming, laid-back, helpful and well-organised (he offers maps, and tips about getting around the city etc).
The flat is in a really central location, yet quiet. Restaurants, bars, shops, and public transport are all within short, walkable distance. It is also spacious and tastefully-decorated; you almost don't want to go out!
I'd definitely recommend staying at Rik's :)