folding tonneau soft covers ... which is the best

Pls let me know which one is the best and why
pls include price, where you bought it name of model/ manu
reason why it is the best.
and pictures!! OR LINKS.

other things you can commment is:
drilling required
velcro like access le
lockable?
weather proof rateing?
THANK YOU VERY MUCH

there is so much tonneu stuff out there i just needed to narrow it down

 

I have an Extang Trifecta Trifold. Its been on the truck since March 2007 and works in all temps, holds the snow, keeps out the rain, still looks good, goes on and off completely easily, no drilling, clamps slide into the rail system. It doesn't lock but if you get a pop n lock its the next best thing. I mean it is a soft tonneau, if anyone wants in bad enough. I use it the popnlock plus the tailgate clamp no worries.

 

X2 on the Trifecta. Love mine!

 

I use the truxedo cover and have had it for 4 years. installs using deck rails and has velcro on the side. rolls up easily

 

I have the fold-a-cover G4. It's not a soft cover but it's a folding cover and i absolutely love it. I think I paid around $700 for it.