2010 Prius (owned 2 weeks) and "torn" bumper. How to repair?

I absolutely love my new 2010 Prius and the 55+ MPG that it is giving me with my first 3 fill-ups! I've had it 2 1/2 weeks and accidently tore a small piece of the front bumper while backing off a tree root (I'm still getting used to vehicle's closeness to the ground). I'm sure I can address the white scuff marks (to the left) but not sure what to do about the damaged fiberglass. The area is on the bottom lip and a few inches in size. The damaged piece has not detached. Any suggestions? Youtube has some videos of people using inexpensive repair kits for bumper damage on the Prius (I guess I'm not the only one running over things). Can anyone on this site, attest to the effectiveness of these kits? Ease of use? etc? I suspect this may not be my last bumper repair.....