Solar Screening for lanai
 

I understand there are Solar Screens for a Lanai that block a significant amount of the sun coming into the lanai and also allow you to see out but not in.

Thats the advertisement side of the coin but I'm wondering if anyone has actually installed them or have first hand experience with them and what their opinion is of them.

Do they block significantly more sun then regular screens?
Is the outward view significantly changed?
Is the air flow coming in reduced a lot ?