I saw them 2 days ago, and it was without a doubt the best concert I've ever seen. The only problem I thought was that Scott's voice was drowned by the rhythm section (his mic wasn't loud enough). They do a great job on the GNR covers (Patience was done very well). People who claim that they cannot like VR because "GNR is so much better" are quite ignorant and have a 1-track mind. It is possible to like both bands, and if you care more about the music played than what kind of grudges created the current lineups of both bands, you can thoroughly enjoy both bands. If GNR ever plays in my city (or close to it, depending on what the ruling is about bands who start riots), I will go see it, and I am confident that I will enjoy it as well.
And in regards to some previous comment about Slash never releasing Chinese Democracy...he never had that intention. He quit because he couldn't stand the creation of "the perfect album," which is impossible anyway and he knows that. If you want, you can consider Slash's "Five O'Clock Somewhere" as his Chinese Democracy (that was the intention anyway). It may not be nearly as good as what the new GNR record will be, but that was never Slash's intention.