Not the most exciting of signings but he is a really good player, the fact he doesn't play for City is more to do with the quality of players ahead of him than his lack of quality. His experience and versatility are a big bonus.
As far as his injury record, I know he's had some issues in the past but I think he has been fairly injury free the last few years. So maybe there isn't any serious underlying issue and if there is I'm sure it will come up in our medical. And I don't think he is on massive wages either. So unless he wants a wage increase it should be OK. He's not a player who relies on pace so I don't think his age is really an issue either (unless we offer him a 5 year contract)
The only issue for me is the price. Seems a bit high for a 30yo fringe player with 1 year left on his contract. But that's why we now have Brands in place, to decide whether he is worth that.