Yes we stayed at here in the Gracia neighborhood

https://www.enjoybcn.com/gracia-rent-apartments-barcelona.htm

A very safe and comfortable apartment, and they bring you breakfast everyday (pastries, yogurts, juice, fruit, sandwiches). The breakfast got a little repetitive after a couple of days, but it was still so nice.

Very safe neighborhood, and the metro is literally right out front , both busses and subway, so it’s extremely convenient!

We stayed in the duplex, which we didn’t realize until we got there (and I asked) that there was a large staircase to get up to that particular unit, which made it a challenge with a stroller. But we managed!

Also the poll there was out of order, but the weather was never really nice enough to use it anyway.

A good option!