Check in was brilliant - we got the euro bus from the airport right to the centre (€5.50) walked a long way round (as the satnav was slightly off.) The apartment is just around the corner from Casa Batllo, so once you spot it you shouldn't have to walk too far from there.
Natalie was there to greet us and she apend a good 10 minutes helping us locate evrything on the provided map - which was very useful to know.
Everything is really clean and the apartment was ideal for the 6 of us.