I have eaten lunch at Treehouse probably 5-6 times over the last year. I come to Southpark about once a month for business, and it's right next door to our regional office. I've gotten the same thing every time I've been there- the brisket plate. It's probably the best brisket I've had outside of Texas! You have three options for the brisket- lean, fatty, and mixed. The fatty is the most flavorful and usually what I get. The deviled egg appetizer is really good. The mac and cheese side is about as good as you'll get! My co-workers swear by the brisket salad.
Service has been good- I've seen some negative reviews on Yelp about their service, but I've never experienced it. On my most recent visit this week, our server Hayley was excellent. Prompt, personable and attentive. The outside seating is nice if the weather isn't too hot. I'll probably keep coming here for lunch as much as my co-workers want to when I'm in town!