At first, I tried Infilaser over the other body parts, then I did the treatment for my chin and upper lip. Luckily, I had no pain during both times, however, I had some confusion about usage instructions which I got cleared from the support right after unboxing the device. Shipping was also on exact time with no rescheduling or anything. Hopefully, it remains in fine working condition for as long as promised. I am a happy buyer!!