For years, I believed the perfect scent was that of Roger and Gallet carnation soap, spicy and simple. Potion replicates the exact smell for hours on end - 11 hours later, it still lingered on my wrists. However, its major drawback is that same linearity. It has zero development and screams the same pink shrillness for an entire day.
For value and longevity though, ($11 for a tin that will last forever - the perfume is not very malleable, you'll never make a dent in it) Potion beats other oeillets, like Bellodgia, CdG Carnation etc. Bang for the buck, but apply sparingly.