Its a very modern, very downtown apartment walking distance from amazing restaurants and most of the sites you came to Barcelona. It's stylish, airy, and a tad over-priced when you consider the apartment vs others like it. But, sadly this modernity and expensive room rate does not cover up the occasional and very pungent scent of raw sewage, that at around 5pm every day (and likely other times but we were generally out) perforated around the apartment.
We noted this to the hosts repeatedly, who assured us that something would be done but sadly over the course of our week-long stay, the excuses and the unpleasant scents never eased. I really can't fault the apartment, it's really nice, well stocked, and well maintained as many such professionally run apartments in Barcelona are, but the stench was very unpleasant and literally left a bad taste in our mouths as we look back at our time there.