Glass or polycarbonate?

Glass:
Looks good. I mean really good.
Harder to install and more expensive.

Polycarbonate:
Looks cheap. I mean really cheap.
Sounds like a tonne of gravel in a concrete mixer when it rains.

There's nothing like being able to see the sky and clouds through the roof.
Vastly superior to the translucent appearance of polycarbonate. It is simply
the better, but more expensive option.

As I understand it, both double glazed glass and triple wall polycarbonate
have passable insulation value, making the room heatable in most cases.

Christian.