I received a sample of the Secret Outlast Completely Clean Clear Gel complimentary for testing purposes from Bzzagent.com. I have been using it for several weeks now and putting it through its paces. Let me state for the record, that Secret is the only brand of deodorant that I have been using for the past 20 years.
As far as 48 hour odor protection and no white mark residue, this product does live up to its claims. Perhaps I have an unusual body chemistry, but for me, I find I do have to apply it the next day, or I will experience perspiration under my arms. It also does not evaporate immediately on my arm pits either. This is why I have always stuck to the white solids . In conclusion, I think it is a quality product, just not for me. I will however continue to use Secret deodorant until the day I pass this earth.