Since I was around and 6-string aware when Heritage came along, as well as G&L, I've held both in high regard. I really fell in love with the H140 when I first set hands upon one in the 1980's. Somehow, me owning one, never happened.
I can say that among my friends who knew Heritage, we tended to regard them as a "G-style" guitar that was good, more affordable and useful as a tool for the working musician who wanted a good-quality, G-style instrument that was road worthy. That seemed to be the prevailing view of the brand into the 2000's among working musicians.
Used Heritage guitars from the 80's and early 90's tend have a lot of... patina in my experience.
G&L's, especially ASAT's, same kind of experience. Working man's tools.