Finished up his SBC (had done Prime Schmeciel, Overmars and Costa in the market dip so it was pretty straightforward) and let me tell you, he is worth the coins.
I've taken him for a 5 game test drive and he's banged in more than a goal a game, but that's not the only thing. He just feels like the game is "programmed" in his favor. Positioning and runs are impeccable, lucky bounces to his feet seem a common occurrence and his ability to draw in defenders and free up a darting striker or midfielder is uncanny. Trust me your opponents will key in on him so if you have another good finisher up top for him to supply you won't be lacking for goals scored.
As far as him being a LW, I wouldn't sweat it. The majority of people insta pause anyway and will shift him to CAM or ST I would imagine in order to play him at full Chem. I'm running him in my Brazil squad (my only squad actually), so him and Neymar on the wings have proven loads of fun to play with. He certainly has injected a boost in my interest in the game as it had been growing stale recently for me.