We arrived at Montse's place on a rainy evening in january. The appartment was spacious and located near the Sagrada Familia (5 min walk). City centre was a 15 min walk. Subway station was just around the block.
The host(s) were very kind and immediately upon arrival we were given tips and instructions (and lots of maps, coupons, etc) in regard to getting around in the city. We also talked about Spain and Barcelona in general. That's the part I most enjoy with airbnb - getting the local perspective of things.
About the room - as it was january, outside temperature ranged between 5-12 degrees C, so initally it was a bit chilly inside as well, but there were heaters, so it was all okay.
If you are not used to wearing shoes indoors, I strongly recommend taking a pair of slippers or flip-flops with you.
Oh, and there was a cool cat. :)