I bought a ******** as it was the color / price I wanted, but I really wanted a 'standard' ACR. I ended up buying rear carpet from a friend who had a wreck converted to a race car as well as his stereo, amp and speakers. The carpet made a HUGE difference in road noise (FYI).
The wiring for all the speakers is all THERE (My car is an 09). The tweeters up on the dash under the front window were both there (not removed) and needed nothing. I installed the amp (plugged right in), used hardware from Home Depot - but the seat needs to be removed of course. Door speakers were easy too, wiring was taped there in each door. Bass speaker and small rears were more challenging as as the rear trim piece had to be almost fully removed (I ended up pulling both seats) but its more awkward than it is hard! You need the plastic bass unit that mounts into the rear wall (got hardware from Autozone - mounting locations were there) and the bass speaker screws into that. Again, all the wiring is there - just needs to be revealed by unwrapping the ends that are wrapped in black tape.
I hope that helps!!!