Good plant, very productive, huge tomatoes, ripened last of the high tunnel varieties, decent shelf life.
Flavor isn't awful, but it just doesn't do much for me. I like Anna Maria's Heart better. I like Rebel Yell much better. RY & Mat-Su Express are just so outstanding, any variety growing next to them is going to look bad by comparison.
Great Warrior's flavor can be compared to Tarasenko-6. It's good, but not great.
Here's a pic of Great Warrior:
http://i.imgur.com/jwzGHkY.jpg