Stayed here 2 nights and LOVED the property.
Platinum recognition: AMAZING. Upon checking in I was immediately greeted by Ana the Experience Specialist. Because we checked in early and my gf had fallen asleep while waiting for the room, Salvadore the Front Manager upgraded us to their "presidential suite" which was the 360 degree suite for one night (the second night was booked already). Needless to say the room was amazing
The hotel now switches between hosting a cocktail mixing and paella making event for their platinum guests. The week I visited, we had cocktail mixing so it was fun to learn from one of their bartenders how to make a few drinks. I've heard the paella is better but unfortunately the chef was only teaching the course the following week.
The amenity was a oven glove so I opted for the breakfast on the bottom floor. Food was good but nothing special.
Rooms: The 360 suite was amazing of course. It came with two balconies and a 360 degree foyer with a retractable projector screen on the 9th floor. There were plenty of plugs and the bedside clock was outfitted for the newer iPhones. The second night we were switched back to our original Prestige suite on the SPG preferred floor (2nd floor). We had a view overlooking the rambla and the windows were thick enough that we couldn't really hear the noise unless there were sirens. This room was a little bit older with less plugs and included a Bose and iHome sound system/alarm clock that only accepted the older iPhones. Both rooms had rain forest showers and provided Cinq Monde toiletries.
All in all, I would recommend staying here if you're trying to do all the touristy things. We moved over to the W Barcelona our last 2 nights. While the view was great, we were pretty thankful for having done most of the touristy things our first 2 nights.