Heres a pic of my Indy that i've kitted out with Homepin's DIY leds.  When the pic was taken, most of the left side has been done and none of the right.

You can see the greens (with green LEDs) look awesome (particularly on the A and D standups) as well as red LEDs under the mode lights.

With it all done, i reckon it makes it a bit more exciting - particularly in multiball or a mode where all the lights flash.

Another machine that i think it made a huge difference to is Roadshow