I have an actual Gerni but I used to have a Karcher in another life. My brother bought an Aldi one. All work fine. Mine is a "Classic100.2 Gerni" I think I paid about $120 for it. I have never known anybody who had one that broke down. I tend to think I would go for a brand name. Mine has 2 wands, 2 nozzles and a bottle for detergent etc. It is about ten now and has never missed a beat.
I do. I have a small Gerni and I love it. They are so water efficient that I try to remember to use it instead of the hose for little jobs around the place. They do make the most hideous noise though :(
Yes and it is great for outdoor clean ups. We use it to clean mould on pavers/driveways so they don't become a hazard and slippery, the windows, fly screens and vehicles and windows. It works really well, usually a small amount of water but is quite loud.
Some of the ones with the flash attachments are expensive! You can get a basic one from Bunnings from $100, and based on your budget (and how stubborn the mould is!), you may need some, but not all, of the attachments. The sales and promotions at Bunnings and at tractor stores are good, particular if you need other things like a mower or blower vac.
A good option is to test or hire one at Kennards (or similar) or borrow from a friend and see if you like it.
We own one and use it on thd tiles in the gazebo when they start to look as though it needs a good clean. Have used it on the concrete paths but not so efficient as they have been there for over 45 years.
I have one. I am reluctant to use it for two reasons. It is noisy and it's hose is very difficult to manage. The hose is stiff and doesn't wind up neatly- at any moment can spring free and end up a tangled birds nest that catches everything in its web for a metre diameter. It is hard to wind out too and tries to remain all kinky in the wrong direction. In the past my husband replaced the stupid hose with one that was flexible, but he hasn't done that on this machine unfortunately.
He has commented a couple of times that he should bring the one at work home. It can heat water and is better quality.