It's a pretty new product, so I'd say give it some time and we'll see how it develops. It's not quite as good as booky.io, but that one's been around for a while. I definitely like the minimalist design.
Unfortunately, the design of ProductHunt doesn't allow me to directly reply to your reply, so I'll add my reply to my review. Both booky and bookmarker have the bookmarklet, but booky.io has much greater flexibility in terms of where you want to file the bookmark. There's also a browser extension for it. You can easily create new categories and/or new pages. But as I said, booky.io has been around for a while, so it's had time to develop these features.
