If you have a US Galaxy S3, all LED programs have issues with the colors (Handcent, GoSMS, etc) except LightFlow. If you select Green, it will be Blue, etc. LightFlow works flawlessly. The problme I have with LightFlow is the battery would drain faster with the app installed. I ran a test where I left the phone idle for 55 mins (no screen on, no led flashing, no gps, txt, phone..) and battery drainage was 8-10%. I uninstalled the app, and did the same test and battery drainage was only 4%. For now (until GoSMS supports LED for the US S3), I'm just using the built in S3 Led Notification option (under system settings). It works, you just can't change the colors.