I’m very impressed with this device! I highly recommend wearing sunglasses while using to protect your eyes. Also be careful not to press the device too hard onto your skin, I accidentally burned my arm, but once it healed it didn’t leave a mark. I’m already shaving my legs way less! I just happen to be the perfect candidate though (light skin, dark hair). I haven’t used on my bikini line yet as I’m a little nervous that my skin is darker there, but I have effectively used on my legs, arms, underarms, and I’m starting to use it on my face on a level 6 (not sure of the results yet).