i have to admit, compared to SBsettings, this for sure does make a difference...for me it wasnt as huge as some that posted here but its enough to notice.
I got about 2 hours use and 30mins or so of extra calling when compared to the Sbsettings.
I did almost the exact same thing with the 2 installed by themselves. I ran the battery till the 10% warning and checked the time in usage. Of course its not a 100% perfect accurate test, cause i might of run something for more time or whatever, but it was the best i could get.
However...i notice something that does drain your battery like a fat kid on a cupcake....BACKGROUNDER....i dunno if its just me, but BACKGROUNDER was tearing through my battery at a alarming rate. I removed it since i really dont use it as much as others. I can see the need for pandora (never use it, im a audio geek and have only ALAC on my iPhone and iPod). However how much it ate my battery, i couldnt justify having it.
So, today is the first day without Backgrounder...i used my iphone today for about 2-3 hours between surfing, listening to my iPod (lossless music), checking my email, playing 3d Lab, sending about 30-40 text messages...I took the phone off the charger at 12pm today, its now 11pm and im at 70% battery....








Backgrounder more like.....Batterygrinder.....so if you dont need it, DO NOT INSTALL IT!!!