Nora and Erhardt were really wonderful hosts. They checked in with us beforehand, and greeted us by phone with a very warm welcome. The place is centrally located in Bo Kaap, and there is a terrific view of Greenmarket Square (a must-visit attraction/bazaar in Cape Town) and the Inn on the Square hotel on the other side. It is just a short walk away from some of the best coffee shops and restaurants I visited on my trip (I had really really good food on my trip). Camps Bay and the V&A waterfront were both just a 10-15 minute drive away; Cape Town is not a very large city. As for Nora and Erhardt, they hosted us at their winery in Stellenbosch for some drinks, and they couldn't be friendlier -- very glad we got to meet them.
Note: If you're a very light sleeper and you must sleep past 8-9 am, this place may not be for you as the square can get a little loud with shopkeepers setting up stalls. I'm an average sleeper, and I was just fine. It's pretty cool to see the lively square in action from up above, though.