First let me say, I love this app. I use it everyday to keep all my PDFs in one place. I’m a university student so the annotation and higlighting comes in super handy. If I could reccomend a single app to any student it would be this one. Its just perfect and well worth the money. BUT…. I REALLY wish they had their own sync feature- not an iCloud based one. I can only use a limited amount of files in the sync feature until it becomes full. If notability had a seperate sync feature (like iStudiez Pro for example), then it wouldn’t fill up my iCloud so quickly. Otherwise the app is absouloute perfection I adore it and I’ll never stop using it.