This is my quick review of the RAC All-In-One Brush. The kit includes a 67 inch telescopic car washing brush, which you can connect to your hosepipe, a alloy wheel brush and a squeegee. The brush head also comes with a soap dispenser which gets released with the water.
I bought this from B&M stores for a grand total of £25.
Overall, the build quality is reasonably good, though the device is quite heavy, and can only really be used in a open space. You also have to regularly adjust the brush head, to get at certain angles of the vehicle.
It's probably better suited to cleaning caravans or large vans, rather than cars.
I personally wouldn't recommend it if you're not particularly strong due to its weight, or if your vehicle is parked in a tight space.