I have been using since they introduced... can't live without it and one of the few products I can use around eyes that actually works.. Need to have a larger size for those of us that use daily ... I have cut back to once a day as looks like HSN does not always have in stock.. lasts a long time, takes just a little bit to do two eyes... but should be used twice a day and you can use it under anything just let it absorb a minute or so then use anything else you want or put on makeup... good stuff