My Centech 'structions says they have added six additional fuses to the fuse block. I bought mine less than a year ago so it may be a new feature. Also, it came ready to use the stock ignition switch. Which is an improvement over previous years. I bought from BC.
Centech kit did not come come with the turn signal switch/harness. I don't think the others do either.
The only problem I had with Centech was finding the correct size hole saw for the grommets thru the firewall. I knew a store that definitely had one but the nearby stores I tried first (Sears/Lows/H. Despot) did not carry it. & my already having an 18" long 3/8" pilot bit made it easier to use.