I've never needed a Thermacell but I'm told they work. However, I don't want to have to depend on one on a backpack trip. Rigging netting is almost foolproof and you don't run out of fuel. Plus you don't have to sleep breathing the stuff.

“In a time of deceit telling the truth is a revolutionary act.”
― George Orwell

It's not over when you lose. It's over when you quit.