So I had the ad-supported (free) version for quite a while, now, and didn't really use it, but I was intrigued by the upgrade, so I went ahead and made the in-app purchase for $19.99. But after that, the only thing that changed from the free version is that the opening screen, where the different piano icons are there, no longer says "ad supported" across the front. Once you open any of the pianos, it has NO new functions, no FX, and no presets, either. So I contacted the app developer online and they did respond right away, saying they are "aware" of the preset problem and working to fix it. Plus, they told me where to find the FX--except my version of the app doesn't have any of the buttons on the left side of the piano that is in the screen shot they provided. So I am inclined to try and get a refund, as 20 bucks is not a cheap app, and I didn't get any of what I thought I paid for. Perhaps it will resolve soon, but as of now...not too happy. So for anyone else who has downloaded this, let me know if yours is working ok. I do have a brand new iPad Pro, so it the app is definitely supported. I tried deleting and redownloading the app, but that didn't do anything, even when I restored my in-app purchase. Sheesh.