I installed it, then promptly uninstalled it in a couple of minutes. Then a few days later I tried it again, used it for about half an hour to give it a proper shake, and still uninstalled it.
While I like the lock screen, the launcher is absolutely garbage. No folders and no widgets? No thank you. Though I do really like the Chat Heads feature, which thankfully is a feature of the Messenger app, and so I’ve kept it. I hope Facebook either substantially updates the launcher aspect of Home, or makes it an option to just use the lock screen.
Ideally, somebody needs to make a lock screen where I can get updates from all my social media accounts (Facebook, Twitter, Instagram, Google+, LinkedIn). I’d pay money for something like that.