easy to customize, am satisfied.

The pre-cut parts are easy to separate out, so you can quickly make the appropriate forms.
I use the foam in my optic trunk, have a permanent place in the now 4 very different optics.
I can say nothing about the resistance to aging, experience has shown that any foam begins after a few years to decompose into small parts - which would not be so good just for photography accessories ...
The alternative would be a foam rubber artigens material but much more difficult to edit.