The ampoule commonly known as Long Name Ampoule lasted me about a year and when the time came to buy the Missha Time Revolution Night Repair Science Activator Borabit Ampoule, its successor, I did not hesitate. This evens out my skintone and keeps blemishes away. There was a month between finishing the old version and getting this ampoule delivered and I noticed its absence. I use two to three drops every night, which makes the bottle last for a long time. So it's worth the price for me.