I went to Lone Tree more for my friend performing (Kingtinued - An Elvis Show) than for anything else.
I ordered the Guinness Onion Rings. Not that psyched on them, good flavor, just not my favorite.
Everyone else around me had a wide variety of their food and everyone loved it. The only dissenter, was Dawn, a vegetarian. She ordered the SaurKraut Balls. Beware the saurkraut balls if you're a vegetarian! There's corrned beef in them (not specified on the menu).
All in all, I'd say the food is slightly above average with good service and a friendly atmosphere.