I used my G23 in Amateur Guardian, I also borrowed a G17 and used it in Competition.
I'm planning on getting a G17 or G34 for IDPA so borrowing the G17 helped alot.
Here are my scores for the individual events.
The results for the match will be out In a couple days, so I will see how well I did. Obviously I did much better with the G17 than the G23, but I put that down to the recoil.