I have them both and I don't really like them because I am so used to finding things in my nice tabbed out 7 rings binder version of the actual code. Also, there are things left out of the quick reference that I have needed so it didn't do me any good. Fortunately, I knew that something was missing. Someone not as familiar with the NEC may misuse the quick reference and do something incorrectly. The quick reference is NOT a replacement for the NEC, it should only be used as a supplement for those very familiar with the NEC. In my opinion.