Assuming you have a compatible screen... then how good (or bad) are these aftermarket freeview units for cars?

OK if you have a good aerial.
Freeview tuning changes from area to area so driving while watching won't last long until you have to rescan.
When I am early for work, I watch it now and then.

Ta!

Ive got Analogue tv in my Nissan Elgrand,its a good picture when you are parked up,but as soon as you move picture quality is poor.

Watch TV while driving, I've enough on listening to the sat nav and watching the speedo without trying to spot Jennifer Anniston's nips

I out a PC into one of my old cars and had a TV tuner on it. I couldn't get nowt from that. Signal was all over.