After using this for the past few days I would say overall it is not that bad of an app. I am really starting to like it. My average battery usage went from 5-6%/hr to 3-4%/hr. I know there are a lot of variables that go into this but I would say it works as well DS Battery Saver. I have also used JD but never really liked that app. I will continue to use this app to see what the long term would be on here but its a good find in my opinion.
If nothing else try it out for a week or so and compare stats. I use Better Battery Stats to get my info from.
White Samsung Galaxy S III -- Hyperdrive RLS12 S4 Theme
Asus Nexus 7 -- Vanilla RootBox
Samsung Galaxy Tab 2 7" - 4.1.1 Leak Rooted
LG Thrill -- Thrill Seeker 3.0 w/ Promethius Kernel
Kindle Fire -- CM10 AlienDroid V2.0