FTCBlock Pro Micro ATmega32U4 5V/16MHz Module Board with 2 Row pin Header for arduino Leonardo Replace ATmega328 Pro Mini (3pcs)

I (and others, read the reviews) have had problems with the micro USB connector coming loose and popping off the board. I've bought these Arduino micro work-alikes from several different vendors on Amazon and from my experience the boards must all come from the same factory, and have this same potential fault. It seems there was one large production run on which the soldering of the USB connector is bad. Plugging the USB cord in/out several times can cause connection to fail, or can actually pop the socket off the board. Hope they fix this in a future production run. All that aside, the boards work great!

Used for mechanical keyboards. All 3 worked fine. I reinforced the ports, but they didn't seem loose or anything to me.I think the LED colors are different from "real" Pro Micros, but it was fine. Edges a bit sharp, be careful. Would buy again.

2 stars off because J1 is soldered bypassing regulator from the factory. Killed a board and OLED screen trying to feed 7v into the RAW pin. Put a board from a different seller in, that doesn’t have J1 soldered, and it works fine.

This worked twice when running the Blink sketch after that it would not see the COM ports on a Raspberry Pi or a Windows machine. As of now its a $6 brickette.

I ran into issues with programming it, but that's not the fault of the product, but it would be nice if the seller had instructions to get this to work with the Arduino IDE.

One out of the three had bad solder joints. Before I could even plug it in to program it, the connector fell off.

Bought these for a homemade split keyboard and the two halves won't communicate. These are crappy knock-offs.

I need to replace them with another manufacture.