I have this one: https://www.amazon.com/gp/product/B07VS2BDGF?psc=1

still waiting on a hardwire kit to fully install. My initial impression is that it isn't quite wide enough. the camera on the mirror part sticks out but it still has to sit lop-sided on my mirror. It's held on by rubber bands. I don't know how long those last but mine came with an extra set. I've turned it on and set it up on the work bench. The camera seems like decent quality, but until I get it wired in I can't say.

I really wanted it for times when the rear view is blocked. kids/luggage in the back making the mirror useless. mine has a feature that allows you to leave the camera display on while driving. I'd love to tell you more but I need another month or two.