I got mine ('12 JKUR) from the dealer for like $80. It's plug and play and comes with acceptable directions. Strangely, they have you run it up the driveline tunnel, but it does have heat protection in some key places. I've had it in mine for over 4 years with no worries.
The only part of the entire process that blows is having to tap the brake light switch for the controller itself (I HATE HATE HATE tapping into OEM wiring harnesses) but again, it's been there for over 4 years with no concerns.
I added a fuse for the controller at a minimum as I don't much trust electronics...