Over a month ago I bought the Samsung Galaxy Tab S 8.4 and I really don't like it anymore because it lags too much, I'm not really into Android, and I want a bigger screen. I'm thinking of selling it and getting the iPad Air 2 64 GB. I also have the Mid 2014 15" MBPr (i7 2.5/16/512/750M), and iPhone 5s. Is it worth the upgrade to the iPad Air 2?