We arrived during check-in hours and were friendlily greeted. Since we couldn't use online check-in we had to check in at a reception desk, but everything went really smoothly. We received our keycards and entered our apartment just 5 minutes after arriving there.
The apartment itself was absolutely fantastic. With five bedrooms and two bathrooms, a nice kitchen and decently-sized livingroom we felt right at home. Everything was very clean and inviting. The beds were comfy (if a bit short for people taller than 1,80 m) and the towels fluffy. After our night-outs in Barcelona we were very happy to return to our lovely apartment and find some rest for the next day.
Check-out was very uncomplicated, just returning the keycards was enough.
All in all a great experience, we felt very taken care of. Definitely recommend.