Go on! Alternatives to Pro Micro TMK Converters That being said, I know that people go with cheaper one and dare to walk into trouble. You will have various troubles on power line, reset to bootloader and flashing when you are careless or sloppy.
I'm never willing to recommend you to use Pro Micro unless you are already familiar to it and have skill to solve problems yourself. You can support by getting Pro Micro from them, instead of clone manufacturers. They have good documentation for troubleshooting.
Sparkfun is really reliable company and have made great contribution to hobby electroincs community. I believe that Pro Micro was designed originally by Sparkfun to be used with Arduino sketches and its IDE, and then it have been copied the design and manufactured cheapy clones by small unknown verdors.
