We really enjoyed staying in this apartment for our 5 days in Barcelona.
It's comfortable, well kept, clean and tidy, and has enough facilities to allow you to do your own thing.
It's a minute away from the bus stop when coming back to the apartment, or 5 minutes walk from the metro (we used the bus more so we could see more sights). It is also a 20/30 minute walk to the centre of town so you are not bound by public transport.
The place itself is in the ideal neighbourhood, far enough away from the centre to be quiet, yet close enough to be in reach of the busy places.
Our host emailed a multiple page guide they'd put together prior to our trip (very thoughtful), which included all the details about the apartment, bar & restaurant recommendations, things to see and do etc, which really helped us plan our trip. There's also a copy left in the apartment.
Unfortunately, our hosts were out of the country on our visit so we did not get to meet them, however, we were left in the capable hands of their friend Vincent who was very welcoming and friendly, and explained everything to us very well.
Our stay was at the end of October, so we had no need for the air con, fans or heating so cannot comment on those.
There's a good few supermarkets within minutes walk, and plenty of pots & pans etc so you don't have to eat out all the time.
I would stay here again.