These are so handy! Saw a similar product on my friend’s car. The phone case I had was part of a purse that detached so it had a magnetic back. I attached it to the holder and up in running with my phone maps in no time! That hooked me, my phone was at eye level, it wasn't sliding around on the dash, no crazy dash mount needed, just these awesome magnetic vent holders. I had mine ordered as soon as I got home. Very inexpensive, the magnets are super thin yet very strong, just slip the phone off of its case and peel off the sticker mount and attach it to your phone case. Very easy to use and extremely useful.