The reality is, Napoli (who are like a peak version of what we could become) spent the best part of 30m on him, probably with half an eye on developing him and selling him for double.
You factor in the PL tax, it's honestly like someone here paying 40m for a 23 year old. He was highly rated, and honestly rated far beyond us to end up at Napoli.
The million dollar question is, is the season in Napoli an abbheration and a bad fit, or will he struggle at a tougher level.
The way the deals structured though, it gives us some downside protection.
As for who he reminds me of, it's Mirallas. Seems to move in the same way to me, quick over short distances etc. However Mirallas looks a better finisher, but from clips I've seen this lad is a better creator.