Lock has arrived. First impressions are good. Supplied with 3 keys, is about the size of a rounders bat, and weighs enough that
you could definitely batter scumbags to death with it it should be able to resist a determined attack. Was easily able to tuck it between the front passenger seat and the rear bench when not in use. Easy to operate - open the lock, twist, slide over the wheel, twist back, lock, done.
The recommended configuration would be to have the metal prongs bracket around one of the wheel spokes, but this is a bit awkward as it might get in the way as you get in/out of the car (unless you have the wheel turned)...
You could also just have it attached to the top part of the wheel. Obviously that allows the wheel to be moved a bit more, so you could conceivably drive off with it attached, but you wouldn't get far. but this is the most convenient and easiest to fit configuration.
There's plastic trim on the "U" section where it meets the main body of the locking bar, which should protect the outside of the steering wheel from marks. But I think I'll probably add some felt trim tape around any part of it which might contact the wheel, just to prevent any risk of scratching.