InVitroGen Dipsticks?

[Robert Rumpf]

Any netheads out there have any experience with the InVitroGen Dipsticks used 
for determining DNA quantity in solutions?  I have heard the literature claims 
of being as easy to use as litmus paper, sensitive enough to detect 20ng/ul 
with only a 1ul sample, etc.  What I would like are personal 
experiences/opinions, etc on whether this stuff works, is cost-effective, 
etc...

Bob