Have had Nougat for about one week on my 6p. Enrolled in beta program and had notification within minutes. The only problem I had was loss of Bluetooth profiles (not a big deal to reconnect), and the Bluetooth connection to Ford Synch does not properly download my phone book. I don't care about this anyway, as I will only answer incoming calls to say I am driving and will call you later.
Nougat is a winner on my device. Faster, more responsive, weak WiFi signals that I could not use before are now adequate for video, and I estimate battery life at 30% improved.