My stay at Casa de Billy Barcelona was a mixed experience.
Pros: nice location, blocks away from Praça Espanya, Barcelona's transportation hub; close to a metro station; walkable to many attractions. The staff was nice and helpful. The place was in an old apt. building, with a few renovated amenities. But, there's still plenty of charm. The price is reasonable given Barcelona's high costs.

Cons: continental breakfast, juice, coffee, and croissant. That's all. I stayed at a single room which was no bigger than a closet. The door could not be closed properly. The mattress was too soft, and sheets too thin and old.

This place is a bit like Barcelona itself, a mixture of old and new, good and bed with lots of charm.

We had a lovely stay at Casa de Billy in Barcelona.
The only downside was that it was not easy to find!
The owners were so friendly and helpful. They gave us excellent recommendations.
The guest house was very clean and well-kept. The baroque styling was a welcome surprise. I really enjoyed discovering all of the vintage furniture, mirrors and trinkets.
My favourite thing was the vintage elevator. The 1900s elevator has been restored and is fully functional.
It's sad to know that Billy will be closing the doors of this excellent guesthouse next week. Perhaps I'll look up one of his other guest houses in Mexico!

Just checked in today and it's in a good location. Clean, quiet and very comfortable. Strangely, though, they only take payment in cash. I booked through Hostelworld and I looked here to vet the hotel before booking and nowhere did anyone annotate they only take cash. That was v very unexpected and I wanted to share that info right away.