Well just as everyone has said Opti is incredibly fast and great products from what I can tell, and of course lab results shown. He literally replies within minutes. Even weekends. I had a question about tracking on a Saturday and was replied to within 3 minutes. Also, these white tops are the clearest product I have ever had. I have had blue tops, grey, black and a gold color. All from other sources and all seemed good but never had any of them reconstitute as quickly and as clear as these white tops. I’ll definitely be continuing my orders through Opti. Oh btw, from order and payment date to delivery was 5 days. That includes a Sunday so that doesn’t count anyway. Thanks Opti