Constance was really helpful in giving directions etc and providing all that I needed at the apartment (which despite being right in the centre of town was quiet, so no earplugs required!!)
The location is absolutely fantastic (within walking distance of many of Gaudi's houses for example, and brilliant transport links) (Oh - if you're vegan/gluten free/wanting organic food etc you will be spoilt for choice - there a number of amazing eateries within a few minutes walk too!)
I loved Barcelona and really hope I can visit again, if I do I'd try and stay at Constance's place again! :-)