So far I am quite impressed with the progress after using the Nood Flasher 2.0 for 5 weeks. I have been working my legs and underarms. After 3-4 weeks I noticed a HUGE difference in the rate and amount of hair growth on my legs. I am not sure yet how effective the treatment has been for my underarms but I will continue treatment for a few more weeks to see more results. Patience is important! For my very first treatment, I used intensity Level 6 and I had no issues. For my second session, I used intensity Level 7 but I noticed burns on my legs. Since then, I've only been using intensity Level 6 and I have had no problems. (The burns went away quickly). Overall, I highly recommend this product and I am shocked at how effective it has been in such a short amount of time. I can't wait to treat other sections next! (Picture is of legs after not shaving for 1 week)