i bought a karcher to tidy up the drive and for the car.it was good for the drive and the slabs but unless you use the patio cleaner attachment it made quite a mess and this had to be cleaned up.
as for the car it was not very impressive and the soap attachment was very fiddly.i have,nt bothered cleaning the car with it since and would,nt recommend buying one, because they simply don,t compare well to commercial units. save your money for visits to the car wash or pay your local car wash guys that have sprouted up all over the place