I got my bfi torque arm insert installed two days ago and I couldn't be happier. It does create a little more cabin noise, but not much. It does vibrate a bit more in reverse, and you can notice it when at a stop light. However, this small $35 piece just makes the car so much more fun to drive. I'm still on the stock tune (saving for k04 and don't want to waste money on an ecu tune) and I can now go full throttle in first gear with zero wheel spin or traction control kicking in (obviously i can rev it up and spin the tires, but I used to get a little bit of traction loss around 4,000 rpms that is no longer there). When shifting, it's just smooth, no jerkiness, which is huge for our cars because when tied in with a little bit of turbo lag, it's a little less fun to drive. Great mod, everyone should get this. I don't know much about the different companies, but I like that bfi is plastic and has some flex in it compared to a metal piece that isn't going to flex. Common sense would say that it would put so much more stress on the other parts of the motor, car, etc