+ Sense of smell a bit better than the original, while decanting strong alcohol smell + Replenishing the cleaning cartridge worked fine BUT - Cleaning system for Series 7 recognizes cartridge only as "half full" cleaning process is started, but stops again immediately -> Warning light red indicates "Empty", cleaning fluid is therefore not recognized - Can not be used and returned (Note by the seller, which systems do not work would be attached and could save trouble and money!)