This is not a popular choice at all. A manager who has been out of the game for a while and also one who when in charge of Liverpool could not admit that his side was lucky to beat Chelsea in a certain match at Anfield. He hated Mourinho - whether it was because Jose had the charm and the looks I do not know - and blamed others for his own failings.
For him at least there is little downside to taking the Chelsea job. If he fails, then he can say that he inherited weakness. If he is relatively successful (ie a top four finish and perhaps one trophy) then Chelsea's arm will be twisted once again to offer him a permanent contract.
It is a struggle as a Chelsea fan sometimes and if anything at the moment I just feel sadness. The real fans are more distant from those running the club than ever - but this is what we have to reluctantly accept as the modern game. This short-termism and secrecy will be our downfall in the long-term.