Is the laser hair removal really effective?

I am posting this question because I am curious if laser hair removal really provides a clean finish when managing underarm or upper lip hair. With summer approaching, shaving or plucking every morning has become such a hassle and severely irritating to my skin that I frequently get folliculitis. My friends have strongly recommended laser hair removal at a dermatology clinic, saying it is the most effective solution for hair management because it completely destroys the hair roots, rather than causing razor burn. However, I am hesitant to make a decision because I am worried about potential side effects such as burns or hyperpigmentation after the procedure. If anyone has actually undergone laser hair removal for hair issues, I would like to know if the results are satisfactory enough to prevent the hair from growing back. Please share your firsthand know-how on how many sessions are typically required to maintain smooth skin.