Very glad I did, ended up one back from the barriers and having a great time. I don't know their stuff as well as I probably should, so could only coherently sing (as much as I ever sing) along to a handful, but that didn't really matter. It was good old-fashioned rock, beer fueled fun.
Support were some generic indie rock band that weren't that bad, but had very few features that distinguished them from every other GIRB, one or two good songs though. <f/x googles> ah... they are called Happylife.