The place was very nice, quiet and you will see amazing views of Barcelona on your way down.
Our only issue was that the route includes uphills and downhills, so it was a bit tiring. So if you're not used to it you will find some difficulties.
The place is very safe, and to get to the city center you will need to walk a bit, ride a funicular and a train (which is in total 30 mins max or even less), the neighbourhood is nice as well but there were guard dogs inside the houses which kept barking at us whenever we pass through lol.
All-in-all it was lovely and we enjoyed our stay there.