I got some free time this afternoon so I installed my OEM automatic day/night mirror w/ compass. It only took 30 minutes. Very easy to do.
The mirror is a very nice accessory. It compliments the Accord's interior well. I have noticed an increase in vibration compared to the standard mirror but it's only when my stereo is cranked up. It's not annoying to me (as long as it doesn't rattle). I recommend getting it if you have some extra cash. Oh yea, btw, don't ask me about the auto-dimming feature of the mirror...my three rear windows are tinted to 5% VLT. The compass and the thing that covers up the connector cable is reallllly cool though!