it doesn't seem to handle multiple monitors very gracefully yet, at least when I used it & on my setup. Felt a little bit slower than gnome and less stable across the board.

For example, the top-bar UI doesn't render certain app icons properly, which was driving me crazy. Maybe it's a settings/config thing. My opinion is if cosmic isn't a drop-in replacement for gnome with extra bells and whistles, im not going to use it.

For all I know, it could be a lot better than gnome at this point. But for a daily driver that I'm working in, I need the stability of gnome over the 'cool factor' of cosmic.

I really liked the direction it is heading and will be using it eventually. Worth installing and trying out!