This guy is absolute class. Would probably already be very much in Arsenals first team picture if he hadn't of missed all of last year with injury.
Still young so don't expect him to start 38 games for us but coming off the bench with 30 mins to go and starting around 20 games he could still have a major impact for us, maybe not as directly as Lukaku in terms of goals but in terms of ability I don't think he is to far away where Lukaku was when he was with us. No way we could ever attract a player like this permanently and he's twice the player of any of Mcmanaman, McClean, Phillips, Sako etc.
Drawback is we will in need to replace him again in 12 months time but I'm sure we would all have taken Lukaku again in hindsight. If we do sign him another winger would be nice (I still think Phillips will end up signing in the last week of the window) but Gnabry, McClean, Mcmanaman as out and out wingers with Brunt as another wide player rather than winger, plus Morrison, Gardner and Sess if he stays can also all play wide (although I dont think any of them are as effective there) gives us plenty of options and certainly means the wings couldn't be considered a big weakness any more.