V.S.
Yeah, I do lots of natural things - clean only with vinegar and baking soda. Eat grass fed beef. Buy organic fruits.
Nix. $20. 10 minutes. Life cycle broken. And yep, they may be like us, but a lot smaller. A lot. I don't have the patience to screw around with weeks of prolonged treatment.
ETA: Having used Nix 4 times over 10 years, I can tell you we have never had a reinfestation or a need to retreat. The lice I find post treatment have always been dead and the nits come off easily. If it doesn't work, they play dead pretty convincingly. That's a new one on me.
Then again, I follow the directions, and I comb meticulously both before and after treatment with a good quality metal lice comb. Plus, knowing that lice is a regular occurrence in schools, I check my kids' heads regularly and proactively, so I catch things early. Nevertheless, you're talking about a second treatment - we've never had to do that with the walgreens version of Nix that we buy. Ever.