Mrs. L.A. liked the rear-view video in cars we’ve rented. I thought I might get her one for her 2010 Toyota RAV4 for Christmas. The few I’ve looked at online seem pretty small, like a 4-inch diagonal screen. I think she’d like something bigger; perhaps 6-inch diagonal. I know I would. Personally, if I were buying it for myself, I’d want one that turns on automatically when you shift into reverse, and turns off when you shift into a forward gear.