OK, I finally got a chance to try it out. It was not really tenkara since I wasn't using a fly, but it was interesting.
I am amazed at the strength of the hera rods. I was fishing a small pond for bluegills and catfish. I hoped to get a few small cats to really test the rod. I ended up with three up to about five pounds. I was using 8# line, and the rod held up great.
The next day, I fished a local river for carp. I only hooked one, and he broke me off at the hook. I have no idea how big the fish was, but 8# line was probably a bit light for carp.
Anyway, the hera rod is impressive.