The branch I availed was the one in Dermabest, Cainta Rizal. A day before my preferred date, I made a reservation for 1pm (1pm is the operating hour of this branch and if you want to leave quickly, being the first customer is the best). When making a reservation, just make sure you have the copy of your voucher since you will need to give the voucher and security code.
The day came and I was looking forward for the diamond peel. We were offered to have a facial cleaning + diamond peel (from the voucher) but we opted to stick to the voucher. The whole procedure lasted 45 mins, a bit short than I expected probably because there is no cleaning but so far Php 150 deal was worth it.