The apartment is really well located, we walked everywhere, parc guell (40min), rambla de catalunya (15m), las ramblas (30m), gothic quarter (45m), el ravel (40m), barceloneta (~55m). Obviously longer walk to get to barceloneta but not a problem. We appreciated staying in a real neighborhood. All those other places were swarmed with tourists and we could always retreat back to our nice air-conditioned apartment for a break! The immediate neighborhood had everything we needed, from groceries, gelato, bakery, restaurants etc.
The apartment finishes were great for a couple traveling with a toddler. Nothing too precious, but sturdy and well-constructed.