Karen's appartment is great - we were a party of 3 and had plenty of space. It is in a really quiet neighborhood but just a few minutes to a bus station where bus #7 takes you downtown. With #25 and Canada line skytrain it's even easy to reach the airport.
Everything was as described (including some basic breakfast, good coffee) and we felt like home in the apartment.
We did not get to meet Karen (because we always returned late) but said hello to her husband and her daughter.
I can really recommend staying here - it was a great experience and we felt like coming home.