I actually enjoyed my steak burrito from Char-Grill, and if it wasn't so expensive, I'd probably give it 4 stars, but $8.59 + tax for a burrito smaller than a Chipotle burrito is a ripoff. Yes, guacamole was included in their pricing but it was the thinnest layer of guac I've ever seen on a burrito. If you ask for everything on your burrito, it's a pretty good size, but not quite Chipotle-level. I'd call it about Qdoba or Taco Del Mar size.
I would describe it as less flavorful as a Chipotle or Qdoba burrito, but significantly tastier than any of the ground-beef varieties you would get at Taco Bell. Sadly, this is probably your best bet for airport food if you're stuck in the RDU airport, but it's still not worth the price compared to eating as soon as you get out. I wish North Carolina would put restriction on airport vendor pricing like California does.