The 135i was my first BMW with iDrive (it was a car already on order rather than to my spec, as I needed it sooner), always passed on it before as I figured it was a lot of money for something my iPhone can mainly do. Having it for a day made my realise I would never be ordering a car without it again - it really transforms the interior of the car, and it's so nice having it inbuilt and not faffing around with wires/sticking to the windscreen etc. The assignable shortcut buttons (which you can assign to anything, and you can hover over them to see what function is assigned, before pressing!) are brilliant, really quick.
So I think you will soon forget about the speed camera issue
I usually only have issues with mobile ones anyway, which are wrong a lot of the time of TomToms etc. anyway.