The shop I work for owns several 881 CT's.
I was assigned to a job recently that called for thousands of feet of 2.5", 3.5" and 4" EMT. I had never installed that size pipe before, let alone bent it. Others on the crew had never used the "table bender" as we call it either. So they brought the bender to the job and our in-house instructor came and showed us how to use it.
Within a day we were all bending the stuff like we had been doing it for years. The bender is very easy to use. It's the same principles as hand bending but with much larger multipliers and distances between bends.
Bottom line, you can do some very professional looking work with a large bender.