that thing looks sweet. I really want one too. I was wondering about a way to put a thermometer to see what's the temp outside. And it looks like that thing has it.
One of the other techs at work had one laying around, and didn't want it, so I installed it in my car. I love having it so far. I already had a compass in the mirror, but not outside temp.
WRX's didnt come with them till '05 I think, unless you have a JDM STi cluster in the bugeye. STi's always had them. ^^ Outside temp gauge anyway.
The Saabaru has an oustide temp underneath the gas/temp gauges.. Nothing on the rear view mirror though, no auto dim and no compass- wish I had a compass sometimes.. Maybe it's just an option for the earlier models... Either way, that thing is sweet!