Communication was painful - it took a lot of effort, including a complaint to Customer Support, to obtain check-in instructions, on the date of the check-in (booking made a month in advance).
To check-in you need to call a Spanish phone number - which comes with a considerable roaming fee if coming from non-EU State.
When we checked in we found we had no blanket on the bed at all. It's Barcelona, but winter nights are quite cool. The place is extremely dark, it has no windows at all, just a narrow strip between the walls which does not allow for almost any daylight. The soundproofing is non-existent.
The apartment is spacious, has all furniture one needs. It is a short walk from the Sants station and approx. 25 min from Paseig de Gracia on foot. Pet friendly. I think thanks to previous guests, it had some salt, sugar and oil. I left a dozen of teabags, I hope they survive for future guests.