I've used it for 8 weeks now. Today, I start my 4-week break. I'm on level 3 and don't find it uncomfortable, and my skin isn't red like others I’ve seen demonstrate the device on YouTube. However, the results are amazing! Besides the obvious oil-control and skin-softening effects right from the start, I can clearly see that my fine lines have improved and that the sunspots have started to fade! Looking forward to the next 8-week period!