He's very cool - when I'm in he has free run of downstairs, although if I'm out and over night, he stays in the kitchen.
He's really good, although he does have a thing for live electrical cables, and after he chewed through the freezer cable (and miraculously survived!), and 2 laptop cables, I've learnt to keep these out of reach...
Mind you he often nips my toe when I'm playing guitar, perhaps he'd prefer me to play acoustic :-)