I also have the ultimate version, which I no longer use... only because I have found that smart actions actually has done the same job more efficiently. JD worked okay for me and improved my battery life but for some, it may actually make it worse because you really have to know what to set up, how to set it up and understand the possibilities.
The same holds true for task managers. They can be effective but only if you use them in a few specific ways. Many people will set them to auto kill and what happens is the app constantly runs to kill apps and processes that immediately start back up again...using a lot of battery in the process. I do think task managers can be helpful to see exactly what is running at any given time and to individually kill a run away app but other than that they can be more harm than good.
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