I use South Seas for my clients and it lasts between 7-10 days. A long lasting tan comes from the correct level of application and post-tan care regardless of what
solution you use (though solutions without E fade faster). The fade is subtle and even and you get the most life out of your tan. If your tan is too dark and you don't keep your skin moisturized, it will start to become blotchy and you will want to exfoliate faster in order to get it even again, therefore lessening the life of your tan. I think it is really important to find that perfect color for your clients and make sure that they are educated on proper care.