He's not to be trusted. You can guarantee if he was a starter for any length of time he'd lose his discipline and start moping around the pitch or getting red cards or demanding all the free kicks and penalties.
Needs to be used sparingly and at the manager's discretion.
...I think he's a real talent. My view is that had he spent the same time on the pitch as Kone he'd have scored and created more goals and we'd have had a better balance. Goal scoring wingers are a premium, we have one that we don't exploit.