I wish I had avoided glass and gone with a tub system right away. In my geographic region (northern Canada) it is was too hard to keep proper heat in glass.
Btw I use Aspen specifically to dry out my tub a bit because I have to have fewer holes to retain heat, high humidity is the side effect of this. Easy cleanup tip, line the bottom with paper towel and then put a light Aspen layer down. When you go to clean, remove ornaments and roll the Aspen up in the paper towel. Clean up remainder with mini broom and dust pan.