Really nice place, with room and light. Bedding are great. Location is great (metro line will guide you anywhere, plus lot of bus stops). Gracia is a real nice neighborhood away of downtown hassle. All amenities close by.
Please note that this a second floor flat (actually that could be 3rd) so if you have difficulties with stairs, take that into account beforehand.
Price seems fair for Barcelona after comparing with other places.
Communication is fine with the hosts, even if we had not so much to discuss.
A small issue with tea towels missing was fixed in a breeze through mobile messaging. Great !