How much is laser hair removal under the armpit? Is the effect good?

My friend did, and she told me that laser hair removal under the armpit won't hurt very much, just a little. She did it in Shanghai Hongkang Plastic Surgery Hospital, and I heard that the medical equipment inside is very good, and the plastic surgery in this hospital is characterized by injection and surgical plastic surgery. As for how much, I don't know. There are preferential activities.