Review on SunFounder ATmega2560 16AU Board Compatible Arduino by Brian Diaz

The board works fine. The bootloader was not installed. Although this is not a problem. Easy installation with USBasp. Be sure to buy one that supports a 6-pin connection. There are many to buy here. The only real issue I had was the onboard 5v regulator punched a hole in the side. This seems to be a common problem with cheap boards used with RAMPS for 3D printers from what you've read online. I unsoldered the ESC and powered it from the USB connector, not the external power connector or the RAMPS. That's the only reason I didn't give 5 stars.