Some of my students bring theirs and I allow anyone who wants to use mine (actually the Wife's Mothers day present) to run quals or the training there after with. Mine being a 3rd Gen. I have no experience with the early gens other than the students run 100% with the Federal duty rounds we use and the high brass shot for poppers.

The only downside I really see is that you can muck things up trying to set it up cruiser ready. However, most won't do that.