OP - It might be a good deal depending...
It would be a good deal if you are installing a supplemental brake system to activate the Jeeps brakes while towing and you need more than 4 leads connecting your towing vehicle to your Jeep.
My towing supplemental brake system (US Gear Unified Tow Brake) requires 6 leads from the Jeep to the towing vehicle. I use a 7 pin (truck and RV standard connection) to 6 pin cable that supplies the 4 leads for lights and signals, a 12 V charge lead to keep the Jeep's battery charged while towing, and an alarm lead to the towing vehicle that activates every time the Jeep's brakes are operated.
My brake system design isolates the Jeeps brake light switch so there is no lamp over-ride issue. Cooltechs deluxe kit might be a good choice for the inertia type ReadyBrake.