Pepo was great, the keys were easy to pick-up / drop-off, the two metro stations within 5 minute walk, the best coffee a few doors down at BlackBird, a monster grocery store a few doors down, felt safe at night, blazing fast internet, good heat/AC, comfy couch and ottoman to unwind after the day. You do need to climb stairs, and don't expect glamor views or a big balcony.
TIP: Because we used the metro and busses a lot, we loaded the "T-usual" card on our phones (they need to approve a picture of your passport, so do this ahead of time). 20EUR for a month of unlimited rides included to/from the airport. We paid a bit more to get the 4-zones for free trips to Montserrat, Sitges, Sant Sadurní d'Anoia, etc.