Im running the Spiider DCCDpro and it works great.
I got the full setup which comes with factory Auto/Manual switch and the factory thumbwheel for when shes in Manual mode. I mounted them both in the centre console near the handbrake/mirror controls.
It also comes with a G sensor which i mounted under the centre console too. The unit itself fits under your stereo behind the centre of the dash.
Its easy to install, the trickiest part is getting a wire from the controller unit to your
ECU to pick up the Throttle position sensoe wire.
Everything else is easy, I took power from the switched positive of my stereo, the switches come pre plugged and there is ample room under your shifter boot to get the two wires down to the actual gearbox itself.
Oh and the handbrake light cable runs right past it all too.
Very simple to install, works great, you can feel when its doing it thing in both the steering wheel and when you pull the box out of gear between changes.