For Face / philtrum / Armpit / arm / hand / leg / calf
After 1 month : Depending on types of skin, it can turn red. But it will be gone in a few hours.
After 3 month : There will be some hairs become removed and got thinner.
After 6 month & later : Once hairs get removed, they will not grow again. Any part having thicker hairs, you can keep your skin clean and elastic by simple trimming.