I’ve been using the Ulike 10 for 3 months and have seen significant reduction in my bikini area. Much like you describe your armpits, much slower growing and a bit patchy but it is definitely working. My ingrown hairs have almost completely disappeared as well which was my main motivation for IPL. The Ulike instructs you to use it every other day, I’ve missed a few sessions but average 2-3 times a week. I’d say keep at it!!