Great signing. George Hill is a competent off-guard too, he's got a 6'9" wingspan and can function off the ball as a triple threat.
Hill is bar-none one of the best vets in the league for teaching youngins. I watched pretty much all of his games last year and you'll see him on the bench giving instructions pretty much non-stop... he's an extension of the coach on the floor in a major way..
Only concern is that his feet hold up, he missed like 20-30 games last year with a string of injuries. Turf toe especially.
One thing you'll notice right off the bat, he did it for Utah in one of the first games vs the Lakers is that he's the type of lead guard who knows when to distribute and knows when to take over. Hill is a closer. His first step is still quick and he's not to be left open from 3 under any circumstance.
Keep this in mind. Utah traded a lottery pick (#12) for him on a one year rental last season!! Kings just used some cap space.. Also Hill's old agent that was fired probably screwed up his extension with the Jazz trying to price gouge them so there's many layers of this being a fortuitous signing.