People generally change kernels for battery savings and to add features the stock one doesn't offer. Franco's kernel has several advantages over the stock one in terms of battery saving saving features, one of my favourite being the removal of MPdecision which in lay-mans terms changes the min and maximum speed the CPU can run at based upon live battery temperature checks. Franco's hot plug driver always keeps 2 cores online and always them to scale from 300mhz to 2.3ghz and based upon load conditions will online cores 3 and 4 if required. When you touch the screen the screen the CPU speed is boosted to approximately 1.5ghz for just over a quarter of a second and when load is reduced the CPU speed is able to lower quickly back to lower speeds thanks to his tuned interactive governor. Franco has created a governor for the GPU named interactive which works very much like how the CPU equivilant does. Franco has added some newer drivers for WiFi which also helps reduce idle battery drain while your on a busy WiFi network. Franco has also added an interface where you can boost microphone, speaker and headphone gain levels for audio enthusiasts as well as an interface to allow screen calibration and load pre set profiles to improve your experience with how your display looks! There's clock speed control, voltage control, governor control, hot plug control. You get the idea its full of cool features which can be controlled with the paid Franco.Kernel Application