I saw 'em open for the Foo Fighters in 2003 and they were amazing. Keep in mind that this was before two band members (one of them being probably the best guitarist in the group) quit. Their performance was unbelievable; it put the Foos to shame.
The band had one hell of a chemistry; very "tight" kind of band. They all knew exactly what they were doing. I doubt they are like that anymore (I've actually heard some recent bootlegs and that pretty much confirms it for me). Really unfortunate.