Review (1/5): Would give 0 stars if I could. Worst customer service from the manufacturer.
My bottle was defective, the dropper wouldn't consistently grab the serum, and would take multiple tries to use. I contacted the support site, which is the manufacturer's page. They told me they didn't have my order #, and since this seller is allegedly third party, they wouldn't do anything to help. If they're 3rd party, why is the support page a link to the manufacturer's site? Then they sent an automated voice-mail back to me when I tried to explain this, and have since ignored all of my messages.