I've read quite a bit on magnetic lashes and most say they are great because they are easy on and off and best of all they do not ruin your natural lashes. I wish this was around in 2012 when I got married. One of my falsies began to come off once I was in the reception hall and I forgot to bring along the glue.
I had to add more black liner to mask the white eyelid space that was showing through. I wouldn't have had this issue with magnetic lashes. I've also read that they stay on without a problem. My natural lashes are long so these won't be for every day but for special occasions like an anniversary or a cruise which I just came back from they would be ideal.
IMO don't knock something unless you try it. Many ideas seem far fetched until at first.
~Live with Intention~