It was a fun jammin' show - amazing guitar work by these boys and I am a big fan of long guitar solos. Being unfamiliar with their music made it all the better as I had no preconceived notions of how a song should sound. Unlike some of the other jam bands I have seen recently, they do play some less-jammy songs in between, allowing your brain a bit of a respite.
My moe.-ron companions who are more into their music said it was not one of their better shows but I thoroughly enjoyed it although the strobe light effects started to get to me after a while. Eugene crowds are generally pretty mellow so I would guess if you saw them in a more urban environment, the experience might be a bit different.
Here is what they opened with (sounds like the guy recording it did not have as good of a time as I did, by his comments)