For many, the decision to go with Firm Feel or Steer and Gear is often regional. FF is on the West coast, S&G is on the other side.
Being in CA, I chose Firm Feel. They have a great rep for quality, and they also offer a variety of other products for making our cars perform in the twisties. I opted to go with their stage 3 steering chuck. They advised a #2, but I was just building the Charger after owning a modified Camaro for several years. I wanted the closest thing to power assisted steering...In a way, the feel of a manual chuck at driving speeds, with assist at low speeds for easier parking. Mission absolutely accomplished!
The steering chuck feels tight with minimal slop. To make things even better, I added their Fast Ratio idler and pitman arms. These are longer than stock, which reduces the steering ratio from 16 to 1, 3 1/2 turns lock to lock down to 12 to 1, 2 3/4 turns. This also increased the steering effort even further.
I run wide tires, a 275 -40 up front. The response is fantastic. Another thing: FF recently released a support bearing and bracket that was designed to reduce steering box flex. Many are unaware of the fact that many times, "twitchy" feel from the steering wheel can be attributed to a steering box that actually flexes on its mounts. This support bracket eliminates the flex and is a bolt-on kit.
Firm Feel is a class act. Their products can transform your car!