This is an exceptional product. My skin has always been highly maintained and healthy, so I like to invest in products that actually WORK! To find one these days is a miracle. I am so glad that Dermastir finally decided to add the caviar ampoules into this kit, with this gold device, the application of the serum becomes a real pleasure, as it stimulates the skin and the circulation, so it becomes soft, radiant and I personally feel it tighter.