Was Witsel the one who made that horror tackle a few years ago?
Berahino is a really good player who, through immaturity and ego, has lost his way. Not too dissimilar to Grealish, except I think Berahino has proved himself.
With stronger management and moving away from local influences, I think he can flourish as a player. Is Koeman the manager who can provide him with better guidance? I don't know, but he feels like the kind of player who would suit his system.
I think for the money being quoted, it's a no brainer for me.