Carlos was an excellent host!
Communication was quick as Carlos was very responsive. He addressed every question and request almost instantaneously. In fact, he even printed our train and tour tickets for us simply because I failed to print them myself.
Check-in/check out was also very easy. For example our arrival into BCN was 3 hours prior to check-in time, but Carlos was flexible enough to allow us to check in upon our arrival to the apartment (around 12:30). In addition, our train to Madrid was not scheduled to leave until 4 pm on the day of our check-out and Carlos was kind enough to accommodate a late check-out as no one else was checking in that day.
I also can't forget to mention the cava and Birba galletas that Carlos so thoughtfully greeted us with upon our arrival! Cava is always a good idea of course, but we loved the galletas so much that we purchased 10 boxes before we left Spain!
Aside from Carlos being a great host, the apartment itself was as described and pictured. It was clean and roomy for all eight of us (including 4 children). It was also within walking distance (no more than a 20-25 minute walk) to mostof the main attractions. In fact, two of Gaudi's residential masterpieces are within 10 minutes walking distance from the apartment, one of which is literally 2-3 minutes away! For attractions that are a little further out (e.g. Montujic, the beach, or Park Güell), the nearest metro station was literally a 5-minute walk away (maybe a little more depending on the crosswalk signal). Finally, if you desire some high-end retail therapy, then get excited because Gucci, Hermes, Zegna, Carolina Herrera,Prada, and many more are within 5-minutes walking from the apartment, on Passeig de Garcia!
In summary, this is definitely a place I would recommend to all my family and friends! What a great find!