The location was great -- a diverse neighborhood with lots of cafes and restaurants, close to two metro lines, the Prado, and Retiro Park. But there are definitely issues with the space, ones we haven't had in any of the other AirBnB locations we've stayed at.
The apartment itself was very clean, but very small (smaller than you might think from the pictures) and the outdoor space doesn't get sun, so it's rather dark in addition to being small. The trundle beds don't stay together; they separate, so they're definitely not suited for romance! And the shower runs out of hot water super-quickly. We had to keep turning it off to suds up, then back on to rinse so each of us was able to get some hot water for our showers.
Finally, the host was out of town, so sent a friend to greet us and give us the key. She was very nice and helpful, even though she had very little English and we had very little Spanish. But the last day after we left, leaving the key inside, we discovered my husband had forgotten his jacket in the closet, so tried to reach Jorge (by Airbnb message, text and phone). We had over an hour before our train, so waited by the door hoping we'd hear back from him, but finally had to leave. About an hour and a half later, we did hear from him (we were on the train at that point) and learned he was in Chile so clearly couldn't help. Granted, it wasn't a big deal, it was just a jacket. But it did occur to us that had we mistakenly left my purse with our passports or medication, we'd have been in a real bind. It is pretty disturbing to realize that there wasn't a local contact provided for any issues that might have arisen (as we had with every other Airbnb we stayed at during our three weeks in Spain)