We would really recommend staying with Vaishali and love to come back to their apartment if ever in Barcelona.
Vaishali's place is in a nice part of town. On Diagonal Avenue, you are easily connected to the rest of Barcelona via the Metro without having having to stay in one of the more congested locations.
The elevator in the building helps if you have luggage or trouble climbing.
The apartment has two bedrooms and well set up for four people. If you like to cook, there is every facility which can be quite helpful.
We were greeted by Vaishali's daughter and husband because we arrived in the middle of the day and unfortunately Vaishali was at work at that time. It was lovely to meet them.