Axl was pretty terrible, but it was the first go and obviously its the willingness to play any VR that is big.
Something I read on the GNR forums I agree with: Frank on the drums didn't really nail some parts of the song like I'd wished. A lot of the energy of that song builds from those pounding drums going back and forth with Duff's intro. Slash and Duff obviously aced their parts throughout it all, I bet it was a weird ass deja-vu experience for those two given the circumstances.
I hope they consider improving it and giving it a few more whirls. I think the odds of hearing anything else VR wise like FTP is pretty much zero, so this could be all we get.