I'm planning to build an arcade cabinet and I didn't want to use the off-the-shelf USB arcade controllers. Instead I wanted a little more customization and control over what I was building. Using the Arduino Pro Micro (clone), and the code here: https://github.com/MHeironimus/ArduinoJoystickLibrary I was able to create exactly what I wanted. And this little breakout board with screw terminals is perfect for my application. I ordered the fully assembled boards (2) and received both the fully assembled v0.6 and the bare board v0.5 boards (as a surprise bonus). Great price, nice design. Very happy with my purchase!
I am planning a joystick based on a pro micro and this is a great way to make the pro micro hot swappable. This is allowing me to quickly test out different code and makes wiring components up very simple. I purchased the bare board as I had the other needed components and the cost was very reasonable.