We stayed at the Prince de Galles last summer with our 2 small children and received a complimentary upgrade to a suite. It was amazing and very much appreciated given it rained pretty much the entire time. There is a sofa bed in the living room which they made every evening for the kids. They will also deliver your breakfast to the room (we just chose the platinum complimentary breakfast but for EUR 10 more or so you can get eggs etc) which is really nice. Highly recommend it if you are staying with kids and we will definitely be back (would probably use an SNA next time just to give better chance of an upgrade). We have stayed at both the Westin and W and they are not nearly as nice.