I don't like the look of lit buttons. I don't think they look as high end or suitable for 99% of car installs as non-lit buttons. Now let me explain this... As Bitt mentioned, this is mainly because of what current "stock" lit buttons look like (or how they work).
The whole button lights up. I don't want a Lite Brite in my car. I would rather go with black buttons and make some mods to allow light through in a more controlled way - such as a shape, symbol or small hole. Similar to the NewKnob or NewNewKnob. It only lets through points of light.
And since the NewNewFace will also ship with clear buttons, those who want color can fill those with a colored piece of plastic, mylar, etc. for their desired effect.
So though I do want to install a lighting kit in my player, I'm after a much more subtle effect.
Bruno