I quit using it a week ago and don't notice any difference.
In my opinion, that pretty much says it all...
Try different kernels. See what works best for you.
I have always been a firm believer in just learning how to manage your phone properly for best battery life. I mean think about it. We have some serious computing devices here that have tiny batteries. In my experience, my phone battery lasts way longer than any of our 3 laptops we have here at home. And yet we still cant fathom that these little batteries don't last us 24 hrs or more? Under heavy use I still don't know why 4-5 hrs. can't be considered exceptable...
Swift, you might be interested in reading this as well:
http://androidforums.com/evo-4g-all-things-root/246908-recommended-setcpu-governer-sbc-4-2-2-non-havs.html