I have used Nair, but I find the results don’t last that much more than shaving. I also have to touch up some areas where the Nair did not work.
If you are going to use Nair, make sure to put Vasoline (or other brand of petroleum jelly) on sensitive areas. The Nair will quickly burn the nipples and aureolas. I also put it down below on the sensitive areas in my groin so that my upper thighs don’t accidentally touch there and cause burns. Same goes with the butt hole if you are going to use it between your cheeks.
I now only use Nair on my waist to thighs, and only when I need to be super smooth. Otherwise I will shave there. The rest of me I wax. (The place I go will not give a Brazilian to men.)