My friend and I both felt that the hotel did not deserve four stars and felt that it only got them because of the (very tiny) pool on the roof. We didn't go into the pool - not worth it - but the view from it was fantastic. The breakfast room felt more like a student canteen than a 4* restaurant, although the choice of food was excellent and the staff also were excellent - throughout the hotel. And they were very helpful re arranging for us to leave our luggage at another Catalonia hotel just off Placa de Catalunya, where the staff were also lovely.
Sorry, but three stars were what it was worth.
A transfer bus to the town centre, and to other venues (for a small fee) would be appreciated. That area of Barcelona is very hilly - have you ever walked from the hotel to Park Guell main entrance? It nearly killed me, and we missed our tour as it took much longer than the advised time - through GetYourGuide/Tours for Today, so not the fault of your company.