This place is amazing! The pictures do not do it justice. The balcony is incredible and provides fantastic views of the city and Sagrada Familia. The apartment is very spacious and has a dryer and washing machine which makes it very helpful for long stays. It has one main bedroom (very comfortable bed with great views) and another bedroom with bunk beds. This is just as suitable for kids and adults.
The apartment is on the Passieg de Gracia and is fantastic for shopping (Zara, Mango etc all nearby). It is so well located that we didn't use public transport at all during our time in Barcelona other than when we first arrived from the airport. The apartment is only a 5-6 min walk from Placa de Catalunya bus stop which is where the airport bus drops you off.
Juanmi is extremely helpful and provided us lots of tips before we arrived. Plus he organised us a 'maxi taxi' that could fit 4 passengers and lots of luggage from our apartment to take us to the airport when we had to leave. I would definitely recommend anyone to stay here and if we are ever back in Barcelona - would definitely stay here. Thanks Juanmi!