"This was my second GForce Performance Chip (I installed one on a 2004 Volvo XC70 turbocharged wagon, and it performed admirably for about 4 years and 42,000 miles). However, the latest chip that I had installed on my 2011 Mazda CX-9 GT didn't work-out so well, and after about 380 miles, I had to have it removed. Since I have now driven the Mazda CX-9 almost 3,100 miles after having the GForce chip removed, and the Mazda is still not running all that smoothly (although it is getting about 6 MPG better fuel economy), I suspect that my car's engine may have some "issues"that are unrelated to the GForce chip!
I returned the chip that was removed from my Mazda to GForce, and they issued a full refund within 10 to 14 days.
The one factor about dealing with GForce that was very unsatisfactory is that their so-called "Customer Service" representative was rude, argumentative, insulting, to the point of getting downright nasty with me! However, once I began dealing with their owners/managers, things went much more smoothly."
"They sent me a double order ... and, of course, Purity Products also double-billed me. This is not the first time that this merchant has messed-up one of my orders."