Don't know anything about him. Nice name though.
It's an absolute yes for me, even at ~£40-45M. Plays either wing, pace to spare, good bag of tricks in the locker. Cuts inside from either wing, can use either foot, not scared to head the ball either. He does more than just score, too--he was both PSV's leading scorer and leading assist man. Won the CONCACAF Champions League while at Pachuca, won the Eredivisie this season at PSV.
He's also, from all appearances, very humble and a hard worker. Very much an Everton-style attitude, would seem to be a good fit from that perspective.
Also, anyone with the nickname "Chucky" (or, equivalently, "muñeco diabólico" or "devil doll") gets extra points in my book. He'll be tormenting the USA for the next decade or more, and I don't really care because he's so much fun to watch.