Guendouzi looks like a very good talent, reminded me of Luiz and Ampadu because of the hair lol, looks very composed on the ball, matured and a very good passer too, he will be a very good player if properly developed and he's at the right club for it, Arsenal have produced and developed many good players along the years, but the lack of trophies is Arsenal's downfall as many of these players latter ended up moving to other top clubs to win titles (Cesc, Van Persie, Ashley Cole, Adebayor, etc). I have high hopes for Ampadu, CHO and Mount, only time wil tell how far they will go here