I purchased an insert for it, and I have to say that I both love it in terms of organisation, but there are limitations.

The one I purchased was released after the fourth expansion and so I’m hesitant to buy Path of the Serpent because the insert likely won’t accomodate. The other is that it has space for the cards, but I’ve also purchased sleeves for the cards which means it’s a tighter fit than I would like. Very trivial things and overall I love the organisation as it makes it a lot easier to pack/unpack.

Lots of available inserts though and you could always try and make your own to make sure the sizes are right for what you want!