If he can become the player I thought he'd become when he was 19 or so, we've struck gold.
I won't pretend I wanted to sign him as I personally think he ended up leaving Arsenal little better than he was when he started there, his development had completely stalled for a good two or three years. I thought the period where he could hone his game to being a capable midfielder had gone to waste.
It'll be a long process but he's looking pretty promising, have an inkling that if he'd remained at Arsenal for even a single season longer it'd have been too late for him to start again, if you know what I mean. On his part, its looking like a great decision to turn Chelsea down. My belief in August was that he'd have been better off there, attempting to take the step up from decent wingback to very good wingback, the position where he could best display the attributes that still stood out at the time. He backed himself to develop in midfield/attack though, and he's doing it month by month culminating (so far) in his display against City.
Early days but he's well and truly on the right track. Turning doubters into believers all over the place