This is perhaps going to sound crazy, but I also think that the one reason for the disagreements regarding the HHT depends somewhat on one's hair -- in particular, on its thickness (and perhaps other factors).

At a recent gathering, we noticed that my hair (which is medium thin in its thickness) didn't work very well compared to other folks' hair at the HHT (on the same spot on the same razor).

Perhaps this is why different folks have different results with the HHT. Arm hair is also different than head hair, and may explain your different results.

Just a thought,

cass