First of all we reached Echo's home at 2.30am and she woke up to welcome us so there is absolutely no restriction for the time you arrive. We were prepared to have some dog-hair in the house so we had no problem with that (you should take that into consideration though in case you are microbiophobic or allergic. In addition, we had a problem the first day because people lived in Barcelona must have a different sense of the temperature comparing to us (GR) because felt very cold but that was only the first day so I recommend the apartment for hotter days if you feel cold like us. It was impressive the fact that she answered every question we had very fast and even when we need some advice during sightseeing. I couldn't imagine a better location since it was max. 30 mins of walking (which I prefer) to every sight except the Camp Nou and the Park Guell. I loved the city, I loved the house, I wish I could live there forever!!