If it is the same one as comes with the Auto Extra Kit this is a large brush with many soft bristles and it has a central spray jet, and so is very good at cleaning vehicles without damage to the paintwork. It is quite unlike the standard brush supplied with the washers. Don't be fooled into thinking that you can clean a car just using spray jets. You will need to use a soft hand mitten or a brush such as this. I use both, with the brush for below the centre line to save bending over.
The only downside is that some Nilfisk Auto Brushes have the plastic "consumer" grade Click & Clean fitting rather than the sturdier bayonet fitting, and so have to be used on the end of the Extension Lance. On the basis that this one has the bayonet fitting I would give it 5 stars.