I have been using JuiceDefender Ultimate for a little over 3 months and I love it! I use the schedule system a lot so when I go to bed it turns my Data/WiFi signals off, which saves a lot of battery. Are you rooted? if not some of the options are not available to you yet.
Settings --> Applications --> Manage Applications --> JuiceDefender Ultimate --> Uninstall
It worked better than juice defender for me. I have mine set to pretty much the basics other than I just let it manage the data and not my wifi cuz I generally have it turned off. I like the options better.