TBH, its quite easy. just gotta be brave. there was some soldering involved but u could use scotch locks. the hardest bit was trying to find a home for all the cables. VERY tight.
agreed, its a pain to squish them in and get the white box back in after on mine im going to remove all the adapters and make a custom loom. having fitted 4 ICE installs i cba with trying to squish another one in