I had a great experience and have not found the first downfall with Justinmind. :p Justinmind has a very convenient layout and a large library of built-in design elements, plus integration with popular platforms, making it easy and even fun to desigm your app. I had tried other apps that boast 'drag and drop' and 'no coding' and I was starting to think that I was just too dumb. Until I found Justinmind! The interface is clean and self explanatory.
With Justinmind, I was able to start my project immediately, and the design elements were easy to work with and very well-thought-out. I wanted something styled with floating widgets and box shadows, bright colors, and an easy and adorable UX. All of the apps I've tried are either broken, inorganized, or ugly and boring. I wanted to design a bitcoin faucets app, because to my knowledge, no one is doing it right on the app store.