Location is under 5 min walk from beach and restaurants, about 10 min walk from the marina. Also the open red top bus stops on the front which we found really useful to use as our sightseeing transport. The accommodation was clean and tidy with everything we needed for a short stay, even washing powder was provided! I was there with 3 adult daughters, we used it as a base and although it is small it was perfect for what we wanted. We want to visit again.
Pros: Excellent location, clean, safe, two blocks from beach, plenty of markets, grocery stores, restaurants, and bars in neighborhood. Washing machine. Half mile from metro. Owner was friendly and responsive.
Cons: Small and sparse. Okay for two people, but would be too cramped for more. Be prepared to buy your own laundry detergent, shampoo, napkins, etc. (easily purchased at the markets nearby). Few outlets (e.g., couldn't have reading lamp and alarm clock plugged in at same time in my bedroom). It's been a few decades since my college days, but that's what it reminded me of -- my first college apartment.
Heads-up to Americans like me: You're not supposed to flush toilet paper down the toilet. This is not unique to this apartment -- it's all over Barcelona (and many places in Europe). There are trash cans by the toilets -- use those. I wasn't aware of this, so I'm including this info for other novices like me. (Not great, but you get used to it within a few days.)