The difference between this guy and most other 17 year olds is that he's physically prepared to play against men already.
He's got that highly sought after combination of pace, power and technique, and we should be looking to integrate him ASAP in cup competitions.
He'll be far more effective than Poveda or Bernabe have been (in that position) and could be a genuine option to compete with Sterling, Sane and Mahrez over the next few years.
If you haven't seen his performances so far he's got his own YouTube channel with some highlights.