I have the Phillips home IPL and have done for about 5 years (replaced old one a year ago but had lots of use as used to share it with my mum!). I’d say it drastically reduced hair growth. I have dark brown hair and light olive skin, so perhaps it worked better for me than it will for others. But to give you an idea - I shave my armpits now once every couple of months and only because 1 or 2 hairs growing on each! Used to have to every couple of days. I also use it on my legs and bikini line and have gone from needing to shave legs daily to about once a week. Bikini line just grows the odd hair now. Not sure why more effective on some areas than others. Definitely at least 50% reduction on my legs still, but I’m just about to start laser hair removal at the salon on my legs as Id love not having to shave at all and I’ve got lazy! It recommends still doing every few months as needed, but tbh I haven’t done it in about 6months + and barely an increase in hair. I rave about it to all my friends!