This place is fantastic, if like me, you enjoy running and eating large quantities of food after. Poble Sec hosts an incredible range of places to drink and eat (Quimet & Quimet being my fave) and has incredible architecture everywhere you look.
Montjuic is great for running up, and there's loads of really cool things up there. Convinced it might be a bit magical.
You're also a very short distance from the seafront and the nearby metro can quickly get you to other bits of the city.
The flat itself is very cute, with an unusual amount of chairs haha! In the day it's quite cool which would be ideal in the summer months. You don't get a huge amount of natural light but you can catch the sun 12-14 in the backyard.
For us, working from home, the internet connection was superb with no cut-outs. We did lots of meetings simultaneously and were fine for this.
Not much else to add! TLDR: great location, good wifi and cool for the summer.