We loved Daniel's place, every space in the house has a tech surprise or it's used efficiently, so we had everything we needed to stay for a month. It's very centrally located, one street away from La Sagrada Familia, and in a very quiet area. The apartment itself is quiet and the windows in the rooms and the kitchen look out to the inner courtyard, so you cannot hear the traffic from the outside.
The amenities themselves are first-class, you have a double room with a mattress to match astronauts (seriously), and the other room fits one person perfectly, although it can get hot in it during summer so I advice not to leave the door and window closed! (or just use the air conditioner). The lights are all controlled via voice, and you can order the hoover to automatically clean your floor (we named it Berti). The sound system is second-to-none, we'll certainly miss it and want to replicate it in our long term home! The kitchen has everything you need to cook pretty much anything. The bathroom is enough for what you need but be sure not to take lengthy showers, since the hot water will last you up to 15 minutes, it does recharge pretty quickly (30~ minutes)
Daniel himself was extremely responsive and looked after our queries with utter diligence, so we couldn't have asked for a better host! Thanks for receiving us in your home Daniel!