Plus: The airbnb is really clean, newly renovated and the hosts are helpful. The beds are comfy and you have everything you need in that apartment. It has a small backyard with places where you can sit - the owners are renovating the backyard at the moment and I think that it is going to be super nice for having breakfast or relaxing outside.
The place has 3 rooms attached to each other and every room has its own new bathroom en-suite.
Minus: Since it is in the Groundfloor the apartment is quite dark. If you are a sunny person like me it is quite challenging for a longterm stay but for a weekend trip you are good to go as the location is perfect 2 min from el Blai in Poble Sec :)
Since everything is new in the bathrooms - they also have automatic taps that respond to movement. This mechanism is very loud and since the apartment is slightly clairaudient, I would definitely recommend replacing this as it gets really annoying when the apartment is completely occupied.
But all in all: I would recommend the stay for a nice touristy visits in Barcelona. A stay for remote workers like me is only a good idea if you are not sensible to Groundfloor rooms :)