In reply to Franco Cookson:
we've got 14v hilti impact drivers at the wall. they're great because you can start the bolt off slowly (the impact doesn't kick in until the bolts tight)
i think theoretically IDs aren't the right tool for route setting, but in practice they work fine. its down to the user, if you're not taking care you'll pop t nuts, cross thread bolts and generally make a mess of things.