I've got the exact one, bought it years ago, but a lot less than that. I wouldn't bother with the Karcher snow foam, grab some
Magifoam Snow Foam.
It's quite good and if you put it on MAX setting it covers the car in a thick, slow dripping foam. However, by all accounts the
HD lance is better, so I'd grab that if I was buying again; it works out about a tenner more expensive for both than your link, but better results.