Me, my wife and son had a whole week at the end of March in Barcelona at Kris's flat. And we left Barcelona with tears in our eyes :)
We met Kris only once when we arrived. It was late but Kris was there waiting and she did not make any problems with that.
The flat is so nice. It's big enough for two couples or a couple with kids :) Its location is great, very close to metro station, but why metro if you can walk everywhere within half an hour. A lot of pubs and restaurants nearby. We watched El Clasico in a pub with Barca fans one night, another night had a walk with Vok away. A lot of markets around.
Internet is fast, kitchen is well equipped, view from the living room makes you feel like a real Barcelonian.
We didn't have good weather, so not used the terrace but it's available, too.
The only thing which disturbed us a bit was the noisy heating.
Taking everything into consideration we'd definitely recommend Kris's flat.