Works, but takes practice.  Can compare to Remee.
There are a lot of customization settings so it takes some practice to get the lights just correct without waking you up.  Not nearly as comfortable to wear compared to Remee.  The Remee I feel lights up at bad times and is more disturbing to your sleep.  However, I would recommend to anyone that wants to try either - download a REM tracking app for your phone.  These programs are about a dollar and can give rough estimates on when you are in REM.  Then you can try to set the mask accordingly - setting the delay correct.  This mask does not need interval programing because it tracks you REM, but it does need delay and you need to adjust the sensitivity and brightness.  I got it to work once, but not since.  Have not gotten Remee to work at all.  I've only had each for about a month, so can't say much more until I have more practice.<br />I think it is important to know you will not take it out of the box and start lucid dreaming, but it holds promise.
Rating: 4 stars