I'm using in my current projects PD boards from Ebay, so I could be interested. Ebay boards are programmable using a single button on the board itself and are less expensive. This one is very cool but IMHO has two weak points: 1. "The board has a sensor which reads your desired configuration from the light pulses generated on this page and stores them on the onboard NVM". What if the company go out of market ? How can a customer reprogram his boards without website? 2. Is that secure ? What if a malicious actor reverse the website logic going around reprogramming the boards to provide max voltage ? It should have a safe button but, at that point, could be convenient to use directly that button to change configuration.