(Question) How effective is the Excel V procedure?

My mother's facial redness is getting worse, and she also has melasma and blemishes. We have been concerned about this, so we are considering the procedure after hearing about the Excel V laser, which can improve both redness and pigmentation issues simultaneously. I would like to know if it is actually possible to treat redness and pigmentation problems like melasma and blemishes at the same time, what the actual effectiveness is like, if it is effective after just one session, how often repeated treatments are necessary, and if there is any pain. I am curious about reviews.

(Source - Haeundae Yonsei Medical)