I love laser hair removal. The number of treatments depend on your baseline hair and skin color. The darker the hair and lighter the skin usually requires less treatments 4-6. You generally need a yearly touch up of just one treatment. I have seen many patients (myself included) that have only had 3-4 treatments under the arms and have never had another tx. The guidelines say "permanent hair reduction" not removal. The most important thing is to have an experienced laser doctor overseeing the treatments. Many pts have had burns due to the wrong laser choice for a given skin type. Don't go for the cheapest, it may be the most expensive in the long run.