Read the "detailed info" on the link at the beginning of this thread: It doesn't distort the image, but can display it in a variety of ways. The one I think is cool has the video input (like from a rear camera) in the middle of the screen with a spectrum analyzer on either side. I haven't seen any mention of an image-reversing feature, so you'd need a camera that does it for proper rear viewing.

Thanks to all who went price hunting too! Look for a review next month!