I have tested them, and the wireless cameras
will work at 100' as advertised, if you have
an unobstructed line of sight. So the claim
of "up to" 100' is technically accurate, but
since this is not the case in 99.99% of
installs, it is certainly misleading. (Your
mileage may vary.)
However, the cheezyness of the X10 ads was a
clue for me, so I researched the products
before I bought any, and I knew what I was
getting into.
I did have a couple of power supplies go bad
on my Ninja mounts while still under
warranty, and customer support was
excellent. They shipped new ones out the
same day, by 2 day service, with no need to
return the old ones. That was about 4 years
ago, so things could have changed, but my
experience was good. I have not tried to
return anything for credit, so I can't
comment on X10 specifically for that. But
typically, businesses don't like to take
back products that are in working order, so
I'm not surprised that people have had
problems with that.
All of my X10 stuff is still working after
four years, with the exception of one lamp
module that I abused to death beyond its
rated capacity with way too many Christmas
lights.
So I think the products are fine for the
price, as long as you buy everything on
sale. And they do work as advertised, if
you read the fine print, but I do think they
should tone down their wild marketing hype.