I've seen Llorente play plenty of times and this is my take on him.
He'll be a very good signing for this team, the salary that is required is maybe high but you gain on the transfer fee because his contract is soon ending, that's a plus.
He's a very good goal scorer, incredible with his head, he'll come handfull because he's accustomed to playing with back to the goal and his good at it. He's quite technical despite his frame, can cantrol the ball and pass with both feet and play those one touch passes that we all hope Matri would've been able to play. His movemenet off the ball isn't as good as Matri because he always plays with his back to the goal and only start running toward the goals when the ball is at the wings.
He's not the top player we all hope we sign, the one who could receive the ball at the top of the box and produce magic like Zlatan, Aguero, Benzema or Falcao but he's a good goal scorer and we desperately need that.
My last point is that i think that Llorente would work better in a 4-3-3.