I have been to Koko's garage three times:
The first time he did a major tune up (flex disc, front shock, transmission service, rear brakes). This work was ok, except that he did not tighten the nut securing the front shock resulting in a suspension noise.
On the second time, my level regulation was not working properly. Ed was exchanging the regulation valve for 660$ without fixing the problem. I did exchange the tandem pump later myself which cured the problem.
The next time the engine cut off in the middle of the run. It took Ed 5 hrs to figure out that it was the distributor cap and rotor as well as the overload protection relais. I understand these are standard problems. Then he charged another two hours to replace those parts. The bill was 760$.
Based on these experiences I would not recommend this shop. I'd rather go to Benz Den who did a good job on my car so far.
Bruno