Press-fits perfectly in the ashtray of my 95 Neon, the hole in the side allows USB plug-in or the RJ11 to be routed through in the vehicle.
Pushbuttons were made by cutting off LEDs.
The only trouble I had with the initial installation was the RJ11 cable wired backwards - fortunately the
MPGuino (the kit from Spiffie) wasn't fried.
I hooked to the #4 injector - unfortunately you can't see the wire because it is in the conduit.