It does look nice, but Apple world only... I'm currently with mac and iPhone, but as a principle I insist that my note taking app will be as cross platform as possible. This is not for practical reason, but for trust reasons. I don't think that every app should be completely cross platform, but notes, at least for me, are essential for the long time, and I don't know on which ecosystem I'll be a few years from now. So picking a platform that at least tries to be cross platform today is the best thing I can do to ensure it'll work for the long run.