You need to make sure that you set a time for the check in as early as possible.
Even though Maria and Oscar were very responsive to our msgs, they werent the ones checking us in. Which meant they have other houses and other guests.
We were informed to let them know when we got to barcelona, but when we did that, we still have to wait for 3 hours in the street for a day that we were already paying the rent of the room for.