I’ve used this for about a month or so now and my hair growth has definitely slowed. I used to be able to go a day, maybe two, before I needed to shave again. I can now go about a week! My hair still grows back fairly similarly in thickness but definitely much more slowly!
It does take time to complete each “session” so I make it a spa day and have a glass of wine and listen to a good podcast! Both legs(just calves), underarms, and lip/chin, take about an hour total.