I cant say enough about the location of this apartment... in the heart of the Gothic quarter, the apartment is on a tiny street that embodies the feel of this old part of town. It is also is very convenient to major Metro lines, Las Ramblas area, and we felt we could easily explore different parts of the city on foot from this central spot.
The apartment had a good layout for us (family of 2 adults and 2 kids), but was a bit smaller than I expected. It was in a nice building and felt very safe. My only complaint is that some things felt a bit tired and could use a refresh (linens, , blankets, towels, glassware).
We had an issue with waiting a while for check in, but I feels that this can sometimes be a one-off problem... I suggest that people read over other reviews to see if this might be a consistent issue.