The best apartment we have stayed in - period. Jon met us in front of the place when our taxi arrived. After thoroughly explaining the flat and all of its many amenities, he detailed the surrounding area giving local tips for dining and activities. There was a basket of snacks, coffee, and a bottle of cava that we enjoyed on the terrace. The room itself is immaculate with a lot of open space. If we weren't sleeping in the very comfortable king size bed, we were often on the giant terrace that extends the apartment via the all glass doors. This truly is a magical respite in the heart of busy Barcelona.
The location was perfect, right off Placa de Catalayuna at the top of Las Ramblas. Easy walks to the shore, the gothic quarter, and the robust metro system. We even hopped a train nearby to the Sitges beaches. Jon made himself available throughout our stay - the place was so well positioned and set-up that we didn't contact him once.
A word of caution! You will fall in love with Barcelona and this place after spending your first evening on the terrace and will find it very difficult to leave.