Kitty's place is perfect for a stay in Barcelona, you can reach everywhere by foot or by public transport (there are bus stops and a metro station minutes away from the appartment). The appartment itself was lovely, lots of character and has a chilled out/artsy vibe, although some areas maybe weren't as clean as previous apartments we stayed in, it was only minor things like the floor hadn't been hoovered prior to our arrival and the bathroom was a bit dusty in areas, this didn't bother us though. The room has a nice little balcony to sit on and watch the sunset. At night it can get a little noisy from the bars and resteraunts below but not so bad that it disturbed our sleep. Check in was easy, we arrived early so arranged to meet Kittys friend who was super friendly and showed us around the appartment when we arrived.
We felt completely comfortable in Kitty's appartment, although we never actually spoke to her much apart from once, however we tend to keep ourselves to ourselves so perhaps if you're a chatty person you might speak to Kitty more...
The appartment was a great place to end our travels around Europe and we'd recommend it to anyone looking for a place to stay in Barcelona.