So far I have only Swirl filter (M50) used. The reason was that 10 years ago the Miele filters were processed rather inferior (detachment of the closure bonding, etc.).
By purchasing a new vacuum cleaner Miele S5 show a clearly better quality and a distinct filter-Plus at the Miele filters.
The main advantages compared to Miele Swirl, however, it is the important motor protection filter that you have to buy more at Swirl only:
Only when improvement was seen by me, that the closure of the bag opening is provided at Miele with a rubber seal and a spring-loaded flap.
So the bag was sealed immediately after opening of the nipple, or when re-closing the door opens easily again.
With Swirl the bag is always open to it (sometimes a bit fiddly) is permanently closed during removal of the bag.
Unfortunately, the flap of the bag Miele works but only at the beginning up to half filled, then jammed the dirt flap and especially in the full state, the opening is open.
The filtering is very good. Odor nuisance can only be seen at almost full bag.
Conclusion:
I can recommend the Miele bag only conditionally.
Excellent, I find that all the filters (ie vent and motor protection filter) are included and very good is also the fine dust retention capacity.
However, the "innovative" closure of the bag through the valve is not working well.
Note:
The current Product of Miele Miele GN HyClean "is (ie without ST.).
This new package you also get delivered (Miele no. 07189520).
Conclusion:
++ Excellent workmanship
++ Excellent dust-retention ability
+++ Exhaust and !! Motor protection filter enclosed
Without Rating: ./.
- Packaging tears bad (unclean) to
- Flap closure only works with an almost empty bag and is open to the exchange of the full bag