Milan Laser treatments and hyperpigmentation?

I have darkening skin caused by PCOS, with the primary affected areas being underarms, elbows, and pelvic area. I’ve always been super insecure about it and keep covered up even during summer months. The dark skin areas look even worse against my translucently pale skin. I’ve been looking into laser treatments with Milan laser, and was wondering if anyone experienced any lightening of darkened skin from treatments? They’re kinda pricey but the lifetime guarantee combined with the potential confidence boost is a major selling point. Any firsthand experience?