Overall, it sounds pretty good, but at around the 1:10 mark you sound just the slightest bit out of tune with your backing track. Also, right around 2 minutes it sounds like you might be just the slightest bit out of sync with the track. Other than those very minor details, it sounds pretty good.

I'm pretty new to recording myself, so I hope someone has some good advice regarding backing tracks too. I've tried making some myself to play along too, but nothing very good yet.
Haven't you heard?

It's a battle of words