4 stars for the plastic handle of the 3-piece set. Otherwise, it would have received 5 stars.

Well... the vacuum cleaner is a revelation.
Its advantages are:

...it is powerful,
it is quiet,
it is lightweight,
it is of good quality,
and it also has a HEPA filter that others do not have.
(It is important not to lift into the air that we breathe whatever is on the floor that we have brought in from outside with our shoes)
It works with or without a bag, storing the dirt inside the plastic container. (however, the cloth basket needs to be cleaned more frequently when not using a bag)
It has a 7-liter container, while most market vacuums do not have more than 3 liters. This means more time before the bags or container need to be emptied.
Its genuine and large bags cost... almost nothing. Only €1.30 each, while small bags from other vacuums cost over €3 each (but there are also cheaper imitations that are still more expensive than genuine Kärcher bags).
It has a relatively long cord and there is no need to constantly change outlets (unless you have a house over 100 square meters or it is narrow and long).
The spiral hose is also long, giving you freedom of movement without dragging the body of the vacuum with each movement.
It glides very easily everywhere.
There are spare parts available if something breaks and needs to be replaced.
It stands out and impresses those who see it because it looks like a specialized device (and it is).
Its suction power increases significantly without a bag.
One of its positives is the very good price. (purchased for €118)

As for the negatives:
The most important one is the plastic handle of the 3-piece set, which "bends" as soon as you apply a little pressure and gives the feeling that it can break if you apply more force. It should have a foldable metal handle.
I think the spiral hose requires a lot of attention because it might easily crack, and if it cracks once or twice, it will likely continue to crack in that specific spot.
The on/off switch cannot be pressed with your foot, but it is not a problem.
It does not have any additional attachments apart from the basic floor brush, although you are aware of this before purchasing it (but if you had any old Bosch, Siemens, etc. vacuums with the classic 35mm diameter hose, it is likely that they will fit. I had a 12-year-old Bosch and everything fit perfectly, even the foldable metal handle, which of course I kept).
The cord does not automatically retract, but it is not a problem. You can roll it up and hang it on a special hook that it comes with.
Of course, I highly recommend it if you don't mind its "negatives"

This is an electric vacuum cleaner that belongs to Karcher's professional series. It is made in Romania, which is not necessarily a bad thing. Currently, it is offered at a lower price than the catalog price, around €120. It is small in size and weight. It has a large bin. Easy to maneuver. Moderate, but sufficient suction power. It does not automatically retract the (long) cord. However, you can roll it up and hang it on your shoulder. It does not have power adjustment, it has a single suction intensity. The power switch cannot be pressed with the foot, unless you wear a stiletto heel. It is equipped with a hepa filter that effectively filters the outgoing air, according to the manufacturer. This filter is disposable and costs around €35, which is about 30% of the vacuum's value. With moderate household use, it needs to be replaced every year. Surprisingly, the bags are cheap, either €15 for a pack of ten or €1.5 each. The corresponding authentic German vacuum bags cost €2-3 each. No additional accessories are provided. There is only the wand, which consists of three plastic tubes that simply fit into each other. No clasps or other luxuries. The plastic flexible spiral hose easily folds (cracks). Fortunately, there is the conventional nozzle with a button that lowers or retracts the brush. If the manufacturer's claims are true, that the motor is durable, of professional specifications, and the filter retains any harmful particles in the atmosphere within the vacuum's range, and considering the small weight, small size, low noise, and the Karcher warranty, for the price of the offer and not the catalog, it is probably worth it.