I noticed results from LHR from the first session. I'm a rather hirsute individual with some sasquatch genes thrown in for good measure, but after my first session I noticed a difference in my facial hair, less coarse with light patchiness. After 4 sessions the only place on my face that grows a shadow is the goatee region, and hopefully that will be gone after the next two.
Things to be wary of- stay out of the sun for a few days after your session. Your skin is more sensitive to bright lights after a treatment and there are risks of permanent scarring if you're out in direct light. Also, don't be surprised if you break out a little bit after a session. It's not due to anything on your part, it's your hair follicles pushing out of your face. Be happy, they won't be coming back for a long time (if ever).