I've been taking my cars to KCM for multiple years and would recommend them to absolutely anyone who needed work done in the Champaign/Urbana area. This is the only place I've ever felt absolutely confident that I won't be roped into paying too much or tricked into unnecessary repairs.
The shop is family owned and operated. There are no employees covering mistakes from a corporate boss. Pat, Julie and the rest of the staff care a great deal about honesty and doing a job correctly. If one thinks of the ideal family business - operated with integrity and hard work - KCM absolutely lives up to it.
They communicate very clearly the nature of the problems, how they intend to fix them, how the costs break down into part/labor, etc. If something is expensive to fix, they don't try to hide it. If it's cheap and easy, they often only charge for parts.
If they aren't experts in some area (mufflers, for instance), they will not hesitate to send you to a place they believe will better serve your needs.
I could go on listing the positive characteristics of KCM, but anything else would be redundant.
If you have a problem with a vehicle, take it to KCM.