I have memories of when Crispix was first introduced as a cereal.
I remember the original commercial and the jingle and the slogan 
I remember getting the cereal not long thereafter;
And I have fond memories of eating it and truly enjoying its crispy goodness and flavor.
Crispix was on sale recently so I bought some. When I got around to opening it  I was greeted with familiar sights and smells. Crispix has that unique hexagon shape. Which, let's face it, is completely there so that you don't start thinking it is Chex. And it smelled just like I remembered.
After the milk was poured I dug in.
The flavor was okay. Nothing to write home about but nothing I will ever long for.
In my memories Crispix is crunchy, but has some body to it. There is some substance to each little bit.
In reality, each one has about the same thickness and substance as two corn flakes.
But the real travesty is that while they are crispy right out of the box and they are crispy when the milk is poured, that is a condition that lasts for approximately five seconds after that.
It's time for a new slogan. 
 - "Kellog's Crispix is crispy times two."
 - Likely the next morning, but possibly that night.
 - "Kellog's Crispix is crispy for two [seconds]."