The location is really central to almost anything within Barcelona. The checkin process is so easy and communication is fast and friendly. The apartment is very modern with all the basics that one would need. It is absolutely spotless and clean. The apartment building lift is really tiny so if you plan to come with bulky things like a pram, you may need to do some steps or really manoeuvre things to get it up the lift. The bathrooms are really well spaced and clean and the bedrooms also super clean. The 5th person will sleep on the couch (which is a pull out couch) if you are planning to be 5 adults.
The kitchen is really beautiful and newly fitted, so everything is super clean and neat.
I really would recommend this place if you plan to stay in Barcelona for a few days.