I've only towed my van for about 1200km but I must say I didn't really feel the need for a camera yet. I guess it would be handy for backing into spots, and I can see on the highway it would be more relaxing being able to see behind you rather than checking mirrors every 3 seconds. Do all the truck drivers have cameras?
Yes. I know it is not legal, but I don't even bother with mirrors any more.
I installed mine myself.
Thats why truckers have the sticker that says if you cannot see my mirrors then I cannot see you. The camera however sees all.