Overall - great experience! We traveled with eight people - four adults, two seniors, one child, and one infant. The flat was great and as described - plenty of common space, sizeable bedrooms, and easy access in and out. Laia provided a pack-and-play for my nephew. The flat is situated in a great part of town - just off of the busy tourist area, close to the river, and with easy walkable access to cafes, restaurants, gelato, etc. There's a taxi stand a block away.
One thing to note - the bar across the street (Red Garter) is LOUD. We heard noise from the bar (and from the patrons who spilled out into the street to smoke) every night. Sometimes it was endurable but once (during a football game), the singing woke almost everyone in the house. The bar closes at 4am. Laia provides earplugs, but if you're a sensitive sleeper, be aware.