I dig the HDs. I can pick up the Orange better than the yellow - which I'm sure all of you Orange nuts on here can dig. I also like the ledge rear sight instead of a slant.
I like the fact that there is "two sets" of sights. The Trijicon disappears during light - and its a generally solid black rear sight with an orange dot on the front, yet when the lights go out - the Trijicon shows itself.
I can only compare it to the Trijicons that came on my TRP, but I prefer the HDs much more.