It's a bag. It protects your griddle. What else do you need? If you're going to spend the coin for the griddle, it just makes sense to get the carry bag for several reasons: 1) it protects your griddle, 2) it makes the griddle easier to carry and store, 3) it keeps stuff like dust and debris from getting on your griddle when not in use and 4) the griddle bag matches the Camp Chef stove bag.
We bought the double, and our griddle fits great in it. This bag is very well made and very durable. Good way to care for your griddle. We put the griddle in the bag and then put the whole thing in the carrier for the double burner stove whech has wheels, and Whaa Laaa! Ready to go. Good price for such a great bag.