Oppo, Teach Me Something New: BMW 8-Series Edition

I posted earlier today how I was introduced to my friend's dad's BMW 840 last night after watching the new NFS movie. I wanna learn more about the 8-series because it simply looks fantastic and I bet it drives fantastic and expensive-like; Because BMW.

Oppo, Teach Me Something New: BMW 8-Series Edition

So what can you tell me about them? Is it good, bad, or something else?