The units low power means you need to spend longer infront of the device before you see results.
Plug it in and turn the timer to required length and sit comfortably! Very easy to use, just a little harder to find a table or surface for it to sit on at the right height for your face. I use it on chest and back also.
Have to be careful as the bulbs do get hot and there is nothing between you and them!
If you accidentally over-wind the timer you have to let the full length run until it switches itself off.
It's a bit cumbersome in shape and weight, but all in all, it does what it's supposed to do.