Veracity of the rumour aside, he's a serious talent. Won CONCACAF player of the year, having turned 22 this summer. Was runner-up for the same award in 2016.
Primarily a left winger, can play on the right as well. Speed merchant with a pretty good end product (about 2 goals every 3 matches for PSV, after 1 in 2 in the Mexican league last season), and good assist numbers as well. Also 1 in 2 for Mexico in 2017 over 12 matches, including a brace in Belgium.
If he's truly available, he's likely to be worth the mooted £43M. Yes, Eredivisie caveats regarding attacking players apply, but I look at him as a young player who left Mexico for a non-Spanish league and continued his success. He's going to drive the USA nuts for the next decade-plus, I know that.