Major thumbs up for Charlie@McKennaBMWService
Just got my car back today after dropping it off with a laundry list of issues. Charlie and the CPO warranty came through and the car is better than ever (new water pump, new turbos, injectors, bunch of gaskets, etc).
I have been to a couple of dealerships in SoCal but I will be sticking with Charlie and McKenna from now on.
If you live in the SoCal area you should be taking your car to this guy, seriously Just send him a PM if you need help.