If you ignore the fact he can't shoot, struggles to beat anyone with the ball at his feet and can't cross beyond the first defender, he's been great. (That might be a little harsh, but it feels like his cross in the Rangers game was the only good one he's made all year).
No doubt he's got power and pace, but needs to sharpen up on some of the basics. I said in a earlier thread I'm happy to use him as an impact sub, but I think Efford deserves his start at the moment.