fire-n-ice It's something I had for the first time on an X5 and cannot believe how useful the system is on a big truck (big on UK city roads), especially as I always reverse park it. Makes me lazy though as I end up relying on it rather than looking properly and it is in theory possible for it to miss an object, not that it ever has
On the Zed - yes - they are useful, but given the rear is so close they are 'nice to have' category items, but I'd not pay for them. Something on the front spoiler to tell me I'm 6" off the kerb would be better before one day I do touch it...