Me too. I've had them before with the large screens and they are noticeable - also passengers were forever asking what it was.
I've just ordered 2 x Mobius cameras - for the front and rear. I like this camera as it's tiny (match box size) and there are loads of different lenses and modifications you can do. One mod is to wire in an extended lens so that you can totally hide the camera box somewhere and leave just the lens (literally the size of a small fingernail). I might do that and hardwire both of them in, they'll almost be undetectable. Another benefit is the 120 minute battery time so you can leave it running for a while after turning the ignition off.
I love my gadgets.