I had a couple of hours to play with this today.
Wiring the control box up is pretty simple, strip off the boot carpet on the left hand side and the loom you need to splice in to is right there along with an earth stud.
Feed the wires for the sensors through the number plate light grommet which is also located in the same area.
Next I whipped the bumper off, as I was using a flush sensor kit that was used on the leon above I had to. I placed the middle two sensors with a 500mm pitch and the outside ones 450mm out from these.
I wasnt happy with the hole size from the qmax 11/16in punch, its OD measured 17.7mm as its designed for 17.5mm + clearance. I popped it in the drill and used it as a getto lathe to turn it down to 17.0mm. This gave a snug fit so I would recommend buying the correct 17.0mm punch and not being a cheapskate like I was.
Really happy with the results, looks OEM rather than an after thought.