OK havent got a IS yet but i be upgrading head unit and rather use a European/uk fasia plate/panel there are some on us sites and / or us ebay they look bit better and maybe bit better colour match so maybe worth getting that when time comes, what has people done when encountered the 3 switches, the TRC and 2 seat heaters as the JDM fasia panel only has 2 holes, 1 with blanking plate and the other 1 would accomodate the other 2 switches!! i know the basic is200 S model dont have this prob as they dont have seat heaters !
Cheers