Well, it’s just unfortunate that a post from someone else slipped in there and without a quote in the post it looks different than what you now illustrate with the quote, just take a look.
I don't think we need to continue this via PM. I have made it clear that your statement is untrue and the matter does not reflect my opinion. You are not backing down, so the topic is exhausted. Let's continue here with the robots...
I find cleaning the Kobold very easy. You just vacuum the filter and that's it. However, I don't have any long-term experience yet.
This type of vacuuming is definitely more convenient!
At Amaz...de today there is a "iRobot Roomba 871 vacuum cleaning robot, with remote control, gray" offered as the deal of the day for 479 euros. That sounds like a good deal to me that I might use.