Moroccan here.
Amazing left food, great technique and decent work rate for a player of his profile.
A bit inconsistent however, Real Madrid last week was probably the first big game where he lived up to his reputation.
Morocco were more or less good in the world cup ( aside from some naivety and lack of experience ) but he hasn't been one of our star performers, which was a bit deceiving for me.
Also got some doubts on whether he can play as a winger in the Premier League, not the strongest guy you will see, if he comes here his best position will be behind the striker or on the top of a midfield 3 ( probably where Kanté plays now ).
Not sure we can attract much better player calibre these days anyways so I would go for it, he has a very high ceiling, if he can live up to that, we're in for a treat.