Anyone have thoughts on the rear view mirror backup cameras that replace your factory mirror?

[GTADUDE]

Hello folks! I originally had an Uniden dash cam which died on me a couple weeks ago, so after looking on Amazon and Ebay for a replacement, I am amazed at how many different setups are out there. I have seen several that are built into a rear view mirror, with a a cam behind the mirror and one for the licence plate/ rear end. I really like how they have a factory look to them and I rather not get one that covers the factory mirror because I drive on really rough roads and it would drive me insane to make sure the cam doesnt fall off. So I would appreciate any advice or expirence or recommendations you may have!