I've seen a couple of games from him. He's quite good, a bit of a kaka and hazard in that mould. He's a good dribbler, not as good as Hazard but a bit better than AJ, runs quite fast and has amazing passing like Kaka in a way. He's tall too. He's young too, 21 years old. ( a month older than Hazard)
Like someone said above, he's a bit inconsistent hasn't had a huge breakout season like Hazard and is definitely a bit of a downgrade. However compared to Hazard, I feel he is a bit of a better finisher, but then Hazard creates more chances so scores more.
In short, with his potential ( Cos it really seems like he could be a great player) at 15 m euros , he'll be a good buy as long as we keep AJ.
His nickname is el nino btw, so when we play Chelsea we could chant that our el nino is better than theirs.