Well after I figured out how to do proper REM checks and get the mask in alignment I was worried. My REM test were working but for 3 nights I wasnt getting any triggers during sleep. So I replaced the batteries and last night I got three triggers. They woke me up because I had the sound alarm up and lights full blown. But I just wanted to make sure it was working and it was! Now I just have to kill the sound and start tweaking how bright it triggers! Yeahhhhhh!