Our stay here was fine. The apartment isn't as nice in person as it appears in the photos (overall the place is a bit worn... ie. scuffs on the walls, the bathroom being a bit grimy, couch had some stains, etc). My towel had two questionable stains on it...... Other than that it's a good size, in a great location, and they did leave a thoughtful welcome basket of goodies and appeared to be pretty attentive overall. Not the best or the worst Airbnb I've stayed at before.
Late check-in - we were aware in advance that there was a late check-in fee however our host was late in arriving to meet us due to dealing with another check-in at another property (they appear to have quite a few and have a team of staff dedicated to running them)... A couple of things on this:
1) We clearly communicated our arrival time several times. Ie. we sent them a message with our flight info several days in advance, on the day of, we messaged them to let them know that we had boarded and were leaving on time (ie. expecting to land in Barcelona on time), we messaged them when we landed and messaged them again when we got into the taxi from the airport to head to the apartment. I do not see how we could have possibly communicated our arrival time better.
2) I would recommend ensuring that you have a phone with data that you can use to contact them upon your arrival. I was lucky that I had a Spanish sim card to phone the Stay U Nique office and alert them that we were left outside waiting for 20 minutes. Since it is in an apartment building, I am not sure what you would do to get in otherwise (ie. there was no direction on which buzzer to use or a code to get in).
3) We were very unimpressed that we were still charged the late check-in fee when the host was the one that was late in greeting us. In my opinion, if you are going to charge or late check-ins then you better be on time. (....also we got there 10 minutes after the late check in time started....)