:bs!: Not all opinions are biased.
I have never taken my car to Ben @ Racepace and have only meet him once, but just from word of mouth, experience, and results I know he is good at what he does and therefore I will recommend him, were needed. Just like, if someone was looking for a mechanic on the west side I would recommend EAS Performance, for the same reasons. See, I will probably never get my tune at Racepace only due to the fact that I have a Wolf3D ecu and Ben would probably not know how to tune/use this ecu as well as my mechanic and Rank Rotary.
Sorry, a little off topic, but had to point out not all recommendations/referrals are biased. Most ppl are genuinely honest.