Pros:
The penthouse unit was clean and comfortable and had a large outdoor space perfect for morning coffee, a pre-dinner drink, or a little afternoon sun. It was in a great location - a block from Gaudi's Casa Mila and central to shopping, dining, and transit. Homes in Blue was quick to communicate and let us drop our bags off since we were several hours early for check in.
Cons:
When we showed up to check in we were informed that there was a 500 Euro security deposit (collected off of the Airbnb platform). It was returned fairly punctually but was about $10 less than originally paid (not sure if it was an exchange rate thing or if I got dinged for something). When I looked at my credit card statement to ensure the deposit had been returned I found another charge from BCN Apartment Rentals for $54.90. This all plays a bit shady and not on the up and up.
ALSO, a penthouse unit in such a prime location had a Nespresso machine, but no coffee pods. Not a penthouse experience.