Having seen in most games he played for HJK, I will be very surprised if he succeeds in Scotland. He's got quite bad skills with the ball, not a good shot, can't cope well with physical play, misses loads of chances and despite his height he's pretty weak in the air. His assets are speed and a good eye for the goal. That was enough in Finland but very much doubt whether it's enough in Scotland.
Or maybe I'm being a bit too harsh on him...he does have talent, but he will need to improve an awful lot to make it. Also, one has to remember that he always got very good assistance in HJK. He must get that at Hearts as well.
Irriducibili? No thanks, I'm a fan of Lazio.