I started by only enabling one notification and experimenting with it until I fully understood their logic. Enabling multiple notifications and having something not work properly can make for some frustrating troubleshooting. Just do one at a time and see if that helps. The only anomaly I've noticed so far is that I'll get a flashing yellow notification when there is nothing to be notified of. I can't say if the notification is being generated by Light Flow or by the phone itself. Other than that, all notifications are working the way I have them setup.
Go SMS has built in settings to change the color and blink rate of the LED notification. It also has a nicer UI than the stock Msg app. Lightflow, however offers the ability to customize color LED alerts for more than just Texts. It is able to customize colored alerts for Social Networking, Gmail, Calls, SMS, and a few others. Personally, I'm okay with just my sms messages lighting up a different color than my calls, and some have reported that Gmail and other programs don't show any LED notification.
I'm considering this application, but I got scared off by the warning that it "takes over notifications" so that if you have an application not on the list supported by Light Flow, you will no longer receive notifications for that application. Is that true?
If I have a reminder app (just as an example) that Light Flow does not handle, which would normally make a sound, flash the LED, and have an icon in the notification section on the top of the screen, which of these events will still occur after Light Flow is installed?