Yup! Installed myself! Hardest part was getting it threaded through the door hinge tube.
It sounds awesome!
I noticed distortion on the stock system at any elevated levels, with this the limiting factor is definitely the head unit now. Have to keep my iPhone at about 85% volume and keep the car volume at a max of about 24 before it starts to distort, which is plenty loud enough to make my ears ring a bit
Next step will be the head unit once Pioneer/Alpine come out with CarPlay supported heads this summer.
I also added some red accents this afternoon à la the '14 Nismo.