The idea that they hold in humidity well is making them really appealing. We are still having a huge humidity issue....I covered the part of the top that didn't have a light on it with foil, and we got a fogger. The fogger will bring it up to where it should be, but as soon as it shuts off it drops back down to about 20%. I've tried Moss. It just dries out. She seems happy and healthy but I want her parameters to be right.
I'm definitely going to look into the pvc enclosures for her next terrarium!