Hey man - it looks pretty damn clean - and especially for your first time doing it!
I have the same year, same color Maxima only mine's an auto. I have my PC mounted under the passenger seat but my next upgrade will be to move it to the trunk. Wires sticking out from under the seat have been bugging me!
Question for ya - how did you get the lilli mounted into the dash? I was wondering if you had any more photos showing how you did that. I'd definitely be interested in seeing your exact steps (if it's not too much trouble)!
Later!