Slavery is maybe the third worst guitarist in Ireland and probably amongst the worst singers.
But that is when you take the basic guitar chording and set it apart to study objectively. And when you do the same with a voice that has survived a million cigarettes and the pints and raw whiskeys that chased them away down forty years of hard nights in old pubs in small towns. It is when you take the whole package that is Slavery Slattery, though, that you can stumble across a unique enough alchemy. He can be magic then. Don't ask me to explain it.