I flew an imprinted MHH last season. Apart from the constant noise (when at home, but silent when out flying) he was great to fly and hunted well, even with other HHs in a cast with both males and females.

He was still in his 1st year when I got him, and I couldn't have wished for a more steady bird on the glove - nothing fazed him.....but I must admit the constant "feed me!" call when at flying/hunting weight in his mews was annoying.

I only had him for a year, so can't comment on any aggression/behaviour issues once properly, sexually mature.

Brian