The stacking system is really great, solidly locking into other ZO hard cases of different sizes, even when pulling 2 or 3 cases stacked together at a 45 degree angle they stay solid together.
The size of a 100cm case is pretty good to fit in the boot of cars without putting the seats down whilst still being able to store a full size rifle.
I would personally swap out the foam for shadow foam or similar as the standard pick n pluck is quite soft.
The case has a reasonable amount of flex in it so that makes it quite lightweight great for carriage.
Incidentally 2 accessory cases stack perfectly (side by side) on top of the 100cm case.
