So I’ve been on the Android N Public Beta for 2 weeks now. So far seems pretty stable on my Nexus 6P. It is so easy to enroll your devices as long as there supported. You just have to go to the public beta site and sign in and enroll your device.
I do like the actionable notifications for messaging and WhatsApp. As well as the notification shade is editable so you can change what shows up there.
I will keep my phone on the Public Beta unless something breaks it. If you no longer want to be on the public beta all you have to do is sign back into the public beta site and in enroll your device and it will be sent the current Android image.