Make sure you don't come to 4 corners bagel shop before 6:00 AM because the Jewish mashgiach only arrives then. The Non-Jewish ones are there from much much earlier, preparing for the brissim, breakfast etc. (without a mashgiach)
BTW-Don't be surprised if you can't figure out which one is the BMG's KCL mashgiach.
Wait till you attend one of their brissim, without any mashgiach either. They have one roaming yid that makes the deliveries to each site. They abide by BMG's KCL guidelines which are politically based not kashrus.