
MTS Rocked!
I had the good fortune (and I really mean that) to be a user of MTS at Wayne State U. in the little town of Detroit, a few miles from the center of the Earth located in Ann Arbor). I was also the first president of Wayne's MTS Users' Group which provided feedback to Michigan for bugs (very few) and system improvements (very many).
Under MTS, the 360/67 supported hundreds of simultaneous users, giving each the illusion of having the complete mainframe to themselves. That's what mainframes are good at. Individual workstations, even PC's can beat them soundly on a MIPS vs MIPS basis, but what they CAN'T do is deliver those MIPS to hundreds (or thousands on newer iron) simultaneously.