I bought an IM with the OCD board in it. I have never used LEDs and planned to remove them all. The LEDs look great in IM with the OCD board. They are on the default brightness setting and they cycle on and off just like incandescents. The pinsider I bought the IM from had an avengers without the OCD board in it next to the IM. I played a game on it and the difference was clear. The LEDs in avengers flashed on and off too quickly and seemed to get out of sequence. They were also overly bright compared to the machine with the OCD board. It is a very good product.