I'm using it for a month or so. Spaces connected with profiles are OP! Option to migrate from Chrome etc. is also sweet. Library (handy space with your downloads, notes etc.) is also a nice addition. The only thing that is preventing me from switching to it is a lack of a developer-mode or something similar, I really miss my F12 shortcut to open DevTools. That's the only minus I can come up with. Really. Great work team!