Anyone use awning side walls on 4wd awning?

[Titfish]

I'm curious about these and want to know if anyone uses them and if so how good are they? I like the idea of enclosing one end of the awning to prevent weather coming in but how big is the gap at the top? Also what other options are there?
http://www.amazonoutdoors.com.au/assets/images/xmas2013/oztcta-rvsw-d_oztrail_rv_shade_awning_side_wall.jpg
Apologies for all the questions.

Ken

[fluids]

Hi Ken.

I use one with my foxwing awning.

http://www.oztent.com.au/foxwing-accessories/foxwing-awning-extension

Perfect for some extra cover, or as a wind break. I use mine especially when I'm out by myself and overnighting using my swag. Because it zips on there's no gap at the top.

Kev..