TL:DR - The verdict: Chin and upper lip, not perfectly hair free but I am okay with retouching every 2-3 weeks depending, as it is much better than waxing imo. As far as the underarms, the hair is definitely less thick and lighter in color (still dark) but it has continued to grow back all along the 12 weeks of treatment, unapologetically so!  Due to scheduling constraints, I was unable to begin treatments as soon as I received my Nood The Flasher 2.0, so I knew I'd possibly miss my return window before finishing the required 8-week treatment. As per the included instruction card in my Nood box, I did the recommended 2 sessions a week for 8 weeks. I did this for both underarms, chin and upper lip. I followed all of the instructions to the tee, the shaving, the exfoliating, the routine, proper placement, the three passes over, etc. and did it all at the highest level (7). I am a light-skinned Latina with dark black hair and of European white, African and Indigenous ancestry; prime candidate for Nood based on their skin tone and hair color guidelines. I began to notice results by week 3 on my chin and upper lip, but the underarms remained unchanged. By week 8 I was not "completely hair free" as Nood claims but I was content enough with much less hair growth and decided I would do an additional 3 sessions a week for another 4 weeks, in the spotty areas still growing hair. All in all, 12 weeks of treatments, totaling 28 sessions on both underarms, chin and upper lip. Plan was to start with these areas before moving to more sensitive and labor intensive areas where the requirement of shaving before a treatment becomes problematic (ingrown hairs, rashes, etc) in between sessions if the Nood doesn't succeed in performing as expected and advertised. Nood The Flasher 2.0 did not perform as claimed, for me, therefore I will not be using it in the bikini area or legs, unfortunately and especially after having read of the struggle others are experiencing with their Nood in these areas. I wrote to Nood about my experience prior to writing this review and their response was basically repeating the instructions I had already stated following and pretty nonchalant.