. I bought this dermaroller in August last year (four months ago). I have been using it on my edges, parting and also on my eyebrows (my eyebrows are incredibly sparse/thin). Ouch the eyebrows! Painful but my eyebrow growth was insane! I saw results within the first month and stopped. I am still dermarolling my edges and my parting. My edges have hair now, long hairs and some shorter baby hairs. But they are thickening up nicely! My parting doesn't seem to be seeing much, I am aware that it might take longer to grow so I'm hoping to see results within the next couple of months. I messaged the team who advised me to try the oil alongside the roller on my parting, so I will be purchasing that on pay day and using it alongside.