We looked at a couple by him and they had nice temperaments - they were just babies though and out of average mares so the movement wasn't spectacular.
He is quite long in the back and a slightly flatter croup too, so I wouldn't want to breed him to a mare with the same fault. When we saw him he was also a little sharper than some of the other stallions at the stud (such as Caprimond & Hohenstein), and I actually came away not overly keen. However I have seen some exceptional daughters of his, often out of mares with a bit of blood (often Trakehners) and I really rate him as a sire
My friend has a gelding by him who has an amazing temperament. He has such a good attitude to life. He is however slightly roach backed but I dont know what the mare was like.
I would definately have a De Niro or Donnerhall youngster.