I wish I had waited a few years (yeah right) to get my adaptor kit, cost me over a £100 from nissan when I got it 3 years back.
Getting the facsia off is pretty easy on the Phase 1 (not sure on the phase 2) just pop the lid in the centre console and pull forwards with an even pressure and it slides out, couple of bolts to undo and your good to get you stereo fitted.
Good luck mate