I liked the easy-to-use interface they have. It was very simple and straightforward, and I ended with a perfect prototype.

The best thing about Justinmind is its ease in designing and prototyping mobile and web applications. It comes preconfigured with widgets and icons to help you put the design element in places with ease. There is a learning curve but with its easy to use interface, it doesn't take much to learn the layout. Another thing i like about justinmind is the easy editing of existing widget texts and colours.

Users have the ability to simulate their prototype within the tool with the apps "Simulate" button. There are also helpful widget tools and users are able to simulate interactions. Wireframes for HTML can be directly exported to HTML. Elements can be dragged and dropped into a frame.