Ok, I'm trying this on on my MIUI. It looks to me like it would give optimal performance with a slight battery life improvement compared to not using any governor. I tried running just Music in the background, with min CPU of 300Mhz and max of 1.2GHz. Most of the time it alternates between 600 Mhz and 1.2 GHz, and only occasionally drops to 300 MHz. If I slightly scroll the screen it instantly jumps up to 1.2 GHz. On the other hand, the ondemand governor maintains it at 300 MHz when I'm just running Music, and it slightly steps up to 600 MHz when I scroll the screen.