If arriving at Barcelona airport, the quickest and cheapest option is to take the aerobus to Placa Catalunya and then the D50 bus to Indepencia - Freser-area Dos De Maig and the flat is on the junction of Industria street and Dos de Maig Street. Alternatively, take the Metro Line 3 from Placa Catalunya to Diagonal and swap to Line 5 to St Pau Dos de Maig (Metro station is directly outside the flat). We used the 10 journey ticket costing about 11 euro and allowing two to travel on buses and Metro (1 hour limit for each journey). The D50 going in to Barcelona runs from a bus stop a short distance down Dos de Maig by the side of the Damm brewery. This bus will pass the Sagrada Familia, Diagonal, Tetuan, Placa Catalunya and finishes at Para-lel close to the port and Montjuic park.
The flat is on the 5th floor (accessible by lift), spacious, light and airy with central heating and a brilliant and powerful shower. The kitchen is well equipped with dishwasher, fridge/freezer, full cooker and oven, toaster, coffee maker and microwave (be careful not to overload the electricity using the kettle, oven and stove together!). Wifi and TV were very useful (able to access our Netflix account on the TV!).
There is an excellent bakery almost next door and a brilliant supermarket within 300metres - up to the top of the street and turn right.
The World Heritage site of Recinte Modernista de St Pau is 300metres up the street and is a stunning place. From the hospital it is an easy walk to Sagrada Famillia and there are lots of restaurants along the road. Excellent public transport makes accessing all areas of the city very easy. We had an enjoyable, varied and entertaining time.