Since I when buying the Miele S8 UniQ vacuum cleaner at Amazon had an air-clean filters in the basic package, I can evaluate my new purchase: Such a filter has not a lifetime of about 13 months. The display indicates that this will also take some time before I have to change. Did I just worried before to stock a new one. Now for a review: As described above, the part is quite magnificent. Please do not ask if the filter fits into other Miele; because I do not know. It's enough for me that the filter so doing a great job in our vacuum cleaner!