I have a meat slicer, so that makes things easier. Sam's club will cut a piece as thick as you want, for you to slice. If you dont have a slicer, get some flat iron steak and a sharp knife. Slice very thinly with the grain. The cut of meat is so tender, it makes for a great moist hoagie. Of corse, you cant get the good rolls out here, and that makes the cheesesteak. You also cant get the sweet peppers or the east coast cherry relish. But enough complaining.
I owned a cheesteak/pizza joint back east. We'd slice almost 500 lbs of ribeye in a 6 day week. Needless to say, I have a very nice tennis elbow.