I’m not sure if I am supporting or not supporting using Code Quick. I also used it when I wanted to get to 20wpm for Extra class (N9VKC in the USA) I struggled going from 13 wpm to 20 wpm using the Gordon West Cassette tapes I had. A couple of Months of Code Quick and I aced the 20wpm test. Fast Forward (decades lol) to now and I use CW exclusively. I’m not a speed demon but can easily copy 25-30 wpm and in contests I’m good for 35-40wpm. Yes sometimes the jingles pop up especially over this past weekend with the CW contest and I was struggling to hear a call or two with all the QRM. That said predominantly I have the call or word down before I hear any jingle in my head. I used to tell people not to use Code Quick because it would hold them back, but then I think of myself and realise that I’m reasonably competent and often just hear the words not the individual letters sent so not sure that was the case with me. As I get older I realise that it is important to encourage new people into the CW fold. There are many ways to do this. Records, Tapes, patient friends, g4fon, Morse Ninja, Code Quick, and probably many many others. If it is the difference between someone learning the code and giving up I’ll support whatever method works for that new operator.