Does the effect of laser hair removal last a long time?

Shaving every time is a hassle, and I've recently been considering laser hair removal because of skin irritation. It bothers me even more now that summer is here; shaving causes the hair to grow back quickly and makes my skin sensitive, which is really stressful. People around me say that once you start laser hair removal, it makes things much easier, so I've become interested.

I'm curious how many sessions of laser hair removal are needed to see proper results. I know it varies from person to person, but I'd like to know the typical treatment frequency and whether the pain is tolerable. I've seen many reviews saying that the skin looks much smoother after laser hair removal and that satisfaction is high, but how long do the results actually last? Since my skin is on the thinner side, I'm also curious if the redness lasts a long time, so I'd like to hear reviews from those who have had it done.