Before I start, I want to say that I have had it since 2002 and of course, I didn't buy it from here but from a dealer and only for home use, amateurishly and with a 30-year-old pressure washer... of course, Karcher, even back then it was worth 70€.
In total, I have unclogged over a kilometer of central sewage pipes, sink pipes, toilet pipes, and many others.
My only complaint was that structurally at the top of the ball there was no hole, resulting in it struggling when encountering a hard obstacle because it couldn't penetrate, and I solved the problem by making a 1mm hole.
A few days ago, I got this ball from here:

https://www.skroutz.gr/s/16165954/Karcher-5-763-054-0-Akrofysio-Apofraxis-050-Plystikou.html

with a factory hole, with a cross-section like the side ones to maintain stable pressure and to move at a steady speed in the pipe, since the 1mm hole I made was somewhat larger than the side ones, so the pressure in front was greater and it didn't move as it should... it got stuck even in straight sections but especially in corners more.
In conclusion, not only is it worth the money, but when you use it regularly, it also saves you money.
Highly recommended!!!

Perfect. I unclogged a pipe D: 10 cm L: 9 mtrs with solidified kitchen fats. I would have liked it to have one more hole at the top to clear the way in front as well. Nevertheless, it did the job just fine.

Very good product. Used with kärcher k7 for cleaning a 100mm pipe. It is a flexible hose but not too much to break. As soon as you press the trigger, it moves on its own due to the pressure. I recommend it.

I did not expect to be able to unclog the drain without breaking the bathroom.... It really worths it... The plumber who came said we would either break the bathroom or dig up the road to find the main sewer line so that the municipal unclogger could come... I unclogged it myself with this.... The drain pipe really shined with three or four passes after unclogging!!

I used it for the clogged drainage pipe, which was 15 meters away. I connected it to a K7 pressure washer from Karcher and it worked well. It took some effort to unclog it, but the result is worth it. A quality product.

I paid a fortune for it, 170€, because I had to use an adapter and a different nozzle since my machine is from the gray series. I thought it would at least do the job, but unfortunately, it only blows the leaves away from the gutters, nothing else. It's a shame for the money I spent.