I purchased the product even with all the negative reviews.  First of all to refill the feeder requires really taking the feeder apart...very cumbersome.  However having said this the green light was on.  I turned it on at the time I wanted it to rotate, 7 am every 24 hours.  I had to wait until the next day, well it never rotated.  Also the lid is very easy to move.  I have a Bengal cat, even if the feeder had worked I know he would have easily been able to move it.  I needed the feeder as we are going away.  However I returned it.  I will look for other options.  Unfortunately there really are no other automatic feeders with any consistent good reviews.  Save your time and effort, this product is not worth the trouble