I know for a fact that some airlines will prefer if you have done the MCC in a jet and not on a King Air B200. Just make sure you take this into account when choosing where to do your MCC.
I did mine at European Skybus. Great place. The instructor spent many more hours than he needed to on teaching us how the systems worked and how to go through the checklist properly. Although I will admit, he was staying in the same accommodation I was staying at.