They were absolute quality. The 1st 2 albums were top notch and it was downhill from there. They did what a lot of bands unfortunately do these days - make a name for themselves with a good unique sound and then once they've done that, sell out the very unique quality that made them, and replace it with musically dumbed-down tripe. It's really sad to see happening!
For some reason I fear Coldplay is heading that same direction, I hope they don't because I am a big fan of Coldplay.