[murphyv310]

Hi.
I agree each to their own. I'd say its a useful addition if you are a TV addict. Although a TV Service engineer for long and weary I have no great interest in watching it. When I do I am extremely picky regarding quality, size of screen, reflections and other minor annoyances.
I'd most likely fiddle with it than actually watch a program, but I'd rather do that in the house than in a car!
When an add on unit costs as much as the car for me I'd really need to justify it, which I couldn't.
Good luck with the project though.