T56 Magnum - American Powertrain Reverse Lockout Module

[Yelcamino]

I'm in the process of buttoning up a T56 Magnum install in my El Camino. I saw an article about the American Powertrain Reverse Lockout Module and I was wondering if it's a must have or will tapping into the brake light wire work just as well?

Has anyone used this lockout module and is it worth $124?

Thanks.