I installed it last night because it looked interesting. Similar to the MobileMe Find My iPhone but free. Anyways, woke up today (8AM) to go to school. My classes are from 8:30AM-2:15PM. I only have a 1 hour break in which I listened to Slacker radio while I used library computer. When my last class of the day came around, I saw my battery meter, 8%! It then died 5 minutes later without no use whatsoever except that 1 hour of Slacker Radio and that's all! Nothing was running in the background or anything! So I warn you guys if you install still that it will SEVERELY bring your battery down.