I use mostly midi files on stage, BUT I and the rest of the band play along. The files are very good, but never as good as a real person. Don't fake it. A day will come when you'll have forgotten (or don't know) most of your own play list.
I certainly hope we don't get into a discussion of the honesty or validity of midi files. Those who use them, use them; those who don't, don't.

DNJ, yeah, playing an arranger can be a little like 'faking' it. I know I sometimes feel a little silly playing a two or three finger chord and getting a full arrangement, but just like midi files, it's how you use them that really matters.

Use the midis, arrangers, drum machines, etc., BUT PLAY! I'm sure most of us would all love to play with a full, live band, but in today's music world that's not always possible or optimal. Let's keep our music going as best we can.

Sermon over.