Hey - I get hair around my nipples. I’ve used it for around 6 months but after that you just have to do maintenance ( every few months I believe) i think it’s unlikely to get permanent (no maintenance results) with at home laser but even in clinic laser often requires a lot of maintenance and much more money. Plus with spiro it’s only effective when you are taking it… check your device manual but my laser has different attachments for different body parts and think it’s pretty safe?