laser hair removal worth it or waste of money

thinking about getting laser done. medium skin (type IV i think?) and dark hair so should be good candidate right? questions for anyone whos done it: - how many sessions for like full body - approx cost per session - which clinic - does it ACTUALLY last or do u need touchups forever saw some deals on groupon for 99 aed per session which seems sus. u get what u pay for right?? my friend got burnt at some dodgy place in sharjah and had marks for MONTHS so yeah im a bit scared of that happening ngl