Fibreglass ladders-anyone use them?

Hi all,

I am in the process of purchasing a new ladder for my business (single man property maintenance) I had it in my mind that I would be buying an aluminium 3 section but came across the fibreglass ones on Wickes website, anybody got any opinions on them? The only advantage I can see with a fibreglass one is that it does not conduct electricity!

http://www.wickes.co.uk/Professional-Fibreglass-Extension-Ladder/invt/191208

they're heavy

They feel alot stronger when your using them than the alu ones tho!