holley 1920 question.

I've been doing some reading on here and some people are saying to just get rid of them that they are crap. What makes them that way? And how are they that bad to earn a crappy reputation? I ask this because I recently found out I had the 1920 economaster carb and decided that I would rather have the better fuel economy so I rebuilt it and plan on putting it on today. It's just for a /6.