The OEM bmw one is ok just a bit optimistic on the indicated distances, for example when it shows 0.3m its more like 0.5m.
Its not a good car to park I dont think having such a long bonnet it can be deceptive, when I first drove it home the sensor came on telling me id stopped 0.3m close to the back of the car infront, mind you the twat did brake suddenly on a zebra xing.
then in my second day of owning it I mustve parked like less than 0.1m away from the wall of my garage, I didnt realise the sensors go on and off, so I had like 0.9m on it went forward then its all red P-- lool, purely luck I didnt crash it that day I tell you :rofl:
Im all good now tho and I pilot it like you would a cargo ship :driving:
Of course being WVM 5 of the 7 days im used to things the other way round, short front but a long back end.