I recently had the dealer install the Procal. Now my car pings more than I like, and there's nothing I can do to reduce it (other than revert to stock settings). I've taken the steps recommended by Ford Racing and by those on this forum, but no luck. I'm going to try one more brand of gas, and if I've still got the ping, the tune is coming off the car. The pinging is more intrusive than I had considered before buying the Procal. It lightly pings intermittantly during normal driving and it moderately pings when I use anything more than half throttle.
If I was hearing impaired, the tune would be perfect! I like the improved throttle response, added torque, and automatic shift characteristics.
For me, one of the big pleasures of driving a GT is the sound it makes. The pinging really has compromised the experience. It's like owning a high-end stereo sound system and hearing static or a hum...even if it is a just a little, it ruins the fun.
Spending the money on the Procal is a gamble. Do you feel lucky? I spent $289 on the tune, and $100 on the dealer install, and that's a big chunk of change for me. I'm pretty disappointed.
2012 Premium GT with glass roof. Bone stock for now.