I use for very many years, electric shavers from Braun. I each own devices from the series 3, 5, 7 and now also a shaver Series 9. With each batch Braun shaver can improve. Compared to my other shavers from Braun of 9090cc is quieter in operation and the shaving result is just a tad bit better. The daily Rausur takes a bit shorter. Although the replacement parts (shaving head and cleaning cartridges) are expensive, but compared to wet razors (blades, shaving cream, etc.) probably not more expensive. Also, the purchase price of an electric shaver is not cheap. My shaver Series 7 I have now for 8 years in use. If one distributes the cost to this time, this fall is not significant. I've always used the original cleaning cartridges and have always been very happy with the cleaning system. Refrain I do not want it. On the one hand saves me the hassle of the manual cleaning, the viewfinder sheets are disinfected and the razor smells fresh. Now I hope that the 9090cc also accompanied me the next 8 years (or longer).