Bought for occasional home use - clean the mower, verandah rails, motor bike, etc. The K2 has adequate pressure but not great cleaning power. Probably the flow rate is too low in this unit. (it's worth researching flow v pressure before deciding on a pressure sprayer) Anyway it didn't matter much because the outlet hose blew off after around 6 hours use. Female thread is shot. I replaced the cheap plastic M22 fitting with something more robust only to see the remaining cheap plastic Karcher coupling fail. I don't want to pay to further repair an obviously under-engineered unit so will be buying a sturdier (non Karcher) machine.
I've written the Karcher up to experience, and written this review so that you don't have to.

The motor started burning out after six months of very light use. I washed my motorbike and truck twice, house windows and gutter once.

Sent it in for repairs at the agent, received it two months later only to find it in a totally dead state.

I used suitably rated extension cords, never ran it dry. My fathers cheap Ryobi is still going strong after 5 years of almost weekly use.