I think that the galaxy notes (I own the 8.0) are really good devices, but s-note is almost useless if you want to use it for anything that is not a casual note. The templates are very bad quality (low res) and if you export them, they become even lower quality. If you import some pdf, it converts it into an image (you lose the text as searchable), and when you export it back you can't even read the image because of the bad export quality. You can't define your own templates, and therefore you can't chose the page size (for example letter or A4). I think that there are some better alternatives. For example, papyrus and quill are vectorial.
BTW, I tried the apps for ipad and they are actually much better. My fav is good notes, which does all the things s-note does, but vectorial. The only problem is that it's an ipad, and thus, you stay with those horrible finger stylus. But that's a problem of the hardware, not the software.