So you've never used it, yet feel the need to coment on its features anyway? Try it. Some things, like the dynamic vertically stacked desktops, simple and attention-grabbing notification UI, and clean overview mode (and even the autohiding status bar, which I hated initially but have grown to like), are actually really nice. Yet they aren't going to look very impressive if your only "experience" with them is screenshots and release notes.
It's good. It broke a lot of stuff, and so many people will forever hate it. And it still has bugs (my biggest pet peeve is that being in the overview mode breaks all the desktop keyboard shortcuts) and misfeatures (app-based window selection will never work for me, though the traditional alt-tab mode is now a well-supported extension). But it's good.
Try it for a few weeks, learn it, then come back and flame.