Cyanogen a mobile OS which came to India last year is a promising OS. It offers rich customisations and Is a Power Packed Os. I myself a User Of Yu Yureka and I found that the device running in Cyanogen Os offers rich customisations. The overall user experience is simply awesome and any device runs smoothly in Cyanogen Os. Also it offers enhanced security features and The user can simply rely on the cyanogen Os. Cyanogen although promises updates to users they do that because I myself got so many updates in My Yureka. I think cyanogen is a great Os and is basically a simple to use Os.