Bagless - nothing more going on

After our last bag vacuum cleaner had several quirks I have become aware 7070 over a year ago in the weekly brochure of our local supermarket on the Grundig VCC. In Internet research - seemed to be well bought.
It is worth mentioning that we had bought my father a few years ago a bagless vacuum cleaner and I wanted to be the miserable Beutelkauferei going.
The Grundig is visually really chic, but the suction subsided rapidly, the case drew the dust / dirt outside just like that.
Emptied dust control - clean, further suck? Forget it! You have to disassemble the unit completely, clean sponge filter wet and then reinstall this only after a long drying.
And even if you've done this is not the suction again optimal because in the narrow corners of the "filter system" dirt particles collect on that I was able to be completely removed only thanks to my compressor with compressed air.
The fact that the housing is dirt inwardly and outwardly magically attracts even a wet cleaning of the parts required.
So just keep only the dirt trapping übern trash, empty ("clean thing") is not.
It is worth mentioning that after a short time, the adjustment of the suction pipe was broken. Although I have got a new vacuum cleaner, because the pipe is not available separately as a spare part. But this is after a short operating time again so dirty ...
So I'm going back a vacuum cleaner bag with purchase. Keep it clean.
Incidentally, my father has disposed of his bagless vacuum cleaner (other brand) many years ago because of these purges.
Had he told me that before, a bad buy would have been spared us so.