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.

What a pile of s#*te this unit is. I will never buy from karcher again. Used a handful of times over a few years and it burst the pump. Split the casing around the Plastic Pump. Junk bought from Bunnings. Very bad design of pump. Disposable after a few times of use. Don't waste your money on this one.

We bought this Karcher 1400W K2 High Pressure Cleaner - With Home Kit after a Bunnings employee recommend it over the Ryobi. Sadly although more expensive than the similar version in Ryobi branding, it was not better. The pressure was insufficient to clean walls and the intake detergent mechinism did not work regardless of how many times we tried it using a variety of methods recommended on the Karcher and other sites. Taking it back for a refund. not fit for purpose.
Update - Bunnings refunded with no issue and we bought a Ryobi instead.

After a year of occasional light use, the pressure hose split. I went to get a replacement but they want almost the cost of a new machine just for the hose! Also it's not covered by warranty as Karcher considers it a 'consumable' part. Wasted time and now the machine is useless.

I pure hasted a karcher k2 with extra dirt plaster but to my disappointment I do not as promised, for a German product I expected more. After 2 days the lifting handle broke of. not enough blast even to shift a little grass in the pavers only purchased it 9 days ago wonder if I can return it. The previously cleaner was a gerni lasted 5 years was only a base model serenely aut performed this one.

I've been using the K2 for 5 years, there is my comment
Pro
The build quality is excellent, which means materials are durable
It is easy to use and set up
It comes with all basic attachments and allows you to handle most of household clearing jobs

Con
The pressure is not strong enough to clear super dirty things
It doesn't come with foam cannon nozzle and you have to buy it separately, unlike other brands it comes with the foam cannon nozzle as free

But overall I am very happy with its performance and build quality, it looks like it is going to last for a long time.

Definitely gets the job done and very easy to use. My mother loved how the front fence and garden bricks looked after I pressured cleaned it with the Karcher. I found it safe to use on my car as well and was happy with the end results. The driveway also looked great and rejuvenated.

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.

My first Karcher pressure cleaner lasted a few weeks. I have just bought a second one to replace it which doesn't work to begin with. I have spent ages on the phone to the support staff who ended up just telling me to take it back. What a waste of time and money.

I have had my Karcher for about 8 years... It is Amazing... love cleaning the congrete around the house and how it comes up so clean.. having dogs they can make the ground very dirty over time.. But with the Karcher i know i can always get it back to new..

Purchased one of these a few years ago and cant fault it. Have used it just about every weekend cleaning dirtbikes, concrete, cars, fence etc. sometimes get a hot plastic smell after long periods of use (1-2 hours) waiting for it to die so i can upgrade but it just wont.

This is a dismal product it really is. Only a fool would buy this. I have purchased two and both
have burnt out on the second use. The First time I thought maybe it was my fault but when I read on line overall about a third of purchasers are dissatisfied with it for the same reason. It is not well made and burns out very easily. There are other products on the market and whatever you buy it will be better than this. Avoid at all costs. Allan

I set out to only leave reviews where I could be positive about a product, however I would like to save someone money by sharing my experience. We have had a bad run of luck with these (3 have died on us after minimal use). Thinking it might be something we were doing wrong, or some unknown factor, I asked a number of people their opinion and it was always the same - not good quality. Sorry to leave a bad review but the evidence needs to be shared.

We living in the city first things it living place. Sometimes we needs cleaning up our car or goods path way this little thing really good. Compact to store. No worry for the rust. It's not too powerful. But without chemical liquid help even the powerful blast can not do the job properly only damage your goods.