Clinic released a few good tracks around 5 years ago.
They had a menacing/eerie keyboard sound and some odd lo-fi production. Quite punk/new-wave-ish but different.
Best singles: Return of Evil Bill, Walking with thee, Pet Eunuch,
I've not heard anything new for a couple of years
On stage they all used to wear full gowns and masks but don't get them confused with slipknot at all.
Regards 'good', I think they are an aquired taste. I love them but they ain't everybodys cup of soup. Supporting Arcade Fire they should be fine and worth catching, I'd go just to see them myself.
Enjoy