He got Monchengladbach and Nice into the Champions League, they were teams like us sort of middling around 7th before he came in. He also got Dortmund as close to the title as they have since Klopp was there.
Defo a good manager, but what we need I'm really not too sure. 63 as well which makes me think he probably hasn't got another 4/5 year project in him.
Still can't see why some are having a nervous breakdown over him...
From just glancing at his record, admittedly without intricate knowledge of all clubs/leagues - he looks meh.