You really should see if you can find one with them installed to make an informed decision, but here's the forum post I started about them a while back:
https://xc40forums.co.uk/viewtopic.php?t=2887
There's a couple of stills in there taken from my dealer's video just after they were installed. The catalogue photo isn't totally accurate: I feel they look like they stick out further than they actually do in real life.
If you're South-East based, you're welcome to see ours, and I'm happy to take a few photos if there's anything specific you want to see.
The official dealership price for them (including installation) is - I think - around £750. If you get your supplying dealership to install them though, you should be able to get a decent chunk down off that. I've often found that literally just asking nicely for a discount is all it takes!!
