After over a year I finally got the inserts in my White Water fully LEDed and installed the OCD board. I love this thing!
After getting all the LEDs in the inserts, I played for about a week without the board installed; my take was that the Cointaker supers were too bright; abrupt flashing on/off of the LEDs was pretty jarring and the nice light-show effects suffered; the whole feel was pretty "in your face" and harsh. Oddly, I wasn't getting any ghosting with the Cointakers, although I had gotten some ghosting with other brands.
After installing the LED OCD the difference was very noticeable. You get all the great colors of the LEDs but the effect is a LOT more natural and mimics the incandescent lights. The smooth fades are crucial to a lot of the lighting effects on this game. For example, the "RIVER" letter inserts have this nice scrolling light pattern that works really nicely when the lights slightly fade but comes off as really clunky otherwise.
The other huge advantage is brightness control. In my experience, finding just the right LED colors can be tricky (i.e., different brands and types give off different colors). Finding the right color AND the right brightness is pretty much impossible. With this board you can focus on the color you want and adjust the brightness (if needed). The LED OCD board tones down the brightness automatically. But you can also custom adjust. I haven't gotten to tweaking the brightness settings yet with the software but will. Mostly everything looks good stock but there are few areas where I want to customize.
Great product! My main problem with LEDs is that while the colors and reduced heat are great, I always felt like the original intent of the lighting suffered and the overall result was a trade-off. With the LED OCD board there is no trade-off, you don't lose anything. You get all the advantages of the leds + you keep the advantages of the original incandescent lights. This is one of those MODs where your non-pinball addict would never notice your game was modded, and that's a good thing!
One day I'll get around to doing the GI.