I have to say that on this product or should I say deodorants in general I have done and tested an extensive range because i'm one of the lucky ones that struggle with not smelling that fresh very quick.
In all my tests and trails I have to say that Shield ended in the top 2 in keeping you smelling fresher for longer. It was gentle on the skin and it kept me fresh. I would not say for 48h, I think the thing that would keep me fresh for that long still have to be developed ;-), but it hold to its promise the longest of them all.
And the smell is to die for, I'm just a sucker for a fresh out of the shower smell that lasts with you through the day.