I installed the STS last night and it was quite simple. I'd probably give it a 1 out of 5 on a scale of difficulty.
The only thing I noticed is that this walkthrough didn't really apply to me since I don't have the heated seats or traction control switchbank on my center console. This meant I had to remove the entire center console, which was only held in by 2 screws, 3 nutes, and a single wiring connector (auxilery 12v power outlet).
I'm suprised by now much the action is reduced in all directions by the simple design. It reminds me a lot more of how my Eclipse shifts with the B&M kit in it.
03 SVT Focus #1612
95 Eclipse GSX - sold
98 Honda CBR F3