Ah man, I'm sorry. To be absolutely honest, I saw them on a mixed bill about 10 years ago at the Bloomsbury theatre, when they were just doing 'slam poetry' (dread phrase), with no backing etc and it was absolutely excruciating. I've not been able to face them since. Given the whole thing the widest of berths.
Lots of people whose opinion I respect (including you, of course) seem to really rate them, but I just can't bring myself to dip a toe in. I get flashbacks to that awful, horrific 10 minute set a decade ago, and shrivel like a salted slug.