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.
I would only recommend using the squeegee on glass, as you can easily scratch paintwork with one.
The only downside is that it has the plastic "consumer" grade Click & Clean fitting rather than the sturdier bayonet fitting found on some other accessories, and so has to be used on the end of the Extension Lance and cannot be used directly on the gun without an extra adapter. Hence only 4 stars.
Note - some Nilfisk auto brushes do come with a bayonet fitting, but without the window squeegee, but they may not have as many dense bristles as this one.