I've got mixed feelings.
The last one I cut open that came off my Silverado looked perfect - much like sayjac's post above.
The 2 that came off my parent's Venture and Malibu looked awful. And the end cap fell off without me even prying on it. Both had seriously wavy media, to the point where I checked for tears. I explained the Malibu already. The Venture had 5k miles on it, 4 month OCI, and went on a 1,000 mile trip so I can't imagine moisture. Before you ask, yes it has had the intake gasket changed a a year or so ago.
I went ahead and picked up a few classics for the next OCI. If it happens with them, I'll be considering switching to something else for their applications.