TBI Chips and Edelbrock where both selling TBI/ECM chips without any data logging info. Both of these companies would state in small print that you have to have a very specific cam and fuel combonation for their chips to work, but people would buy them anyway with a combonation of cam and fuel that where nowhere near what the chips engine combonation where designed for. Then these people would start crying that these chips where no good.
We aren't going to see a ton of new reviews/feedback because TBI is less and less common. But this took me 10 seconds to find. http://www.gearhead-efi.com/Fuel-In...179-tbichips-com-(Brian-Harris)-Useful-or-Not
When you've got others like Howell(?) Out there that I recall recent, good comments about, I think I'd head another way.