I had the oppertuninity to take a class with a Hoshijutsu group when they were getting started at Millersville University in Millersville, PA. I used to go and train on occasion with the Danzan Ryu group there. They invi6ted the DZR group to a mini seminar to introduce the art to others.
Usually, ninja things are more than just a little hokey, and that thought made me think about not going. But I had a good time.
With this group, the lower ranking instructor (I think he was a student who got permission to teach when he started classes there) was much more knowledgeable of his art than most of that rank in other arts. In many organizations he would have been a few Dan grades higher. In a lot of organizations he would have been way, way higher. So the group appears to have high standards for sending out teachers. Which is good.
The Hoshin technique, atleast what we did there, was very Aikido like. Plus they tried to paly up the similarites to the DZR while trying to show some differences also.
If this group is typical of the Hoshinjutsu in general, one would get good martial arts training there.