Mike's in California, so when you said down south I thought it might be some pro-touring poser company.
2015 SCCA Autocross Nationals Recap | Mike Maier Inc | MMI
Mikes won C-Prepared at SCCA nationals outright, and also co-driving Frank Stagnaro's car (above). Frank's won many CP championships himself with Mike's help on the car.
They are also excellent drivers.
Dave Mapes (with the ZebraDart) has used Maier's advice and some parts on his CP Mustang.
So yea. Maeir has a lot of development time and insight into making stuff work. Not cheap for sure, but at least its the real deal.