I like that it is easy to create new scenarios, add scenario names/variables as necessary without having any programming knowledge required! It's also very intuitive so anyone can learn how easily this program works after just one session with tutorials or videos available online via youtube etc - which makes things even easier if you're self taught!! Nothing really i dislike about quadec but would love more advanced features such us creating submodels within an existing model (which may need some coding skills).
Using qdec has helped me get my head around using optimisation software much better than previously used solverbox & excel before now.