I'm sorry to say but the quality of barbecue restaurants that we have in this city has declined. I remember years back when it was quality, now everything tastes bottled and watered down.
First of all, not a big fan of their sauce. I find it too tangy and vinegary for my tastes. The service is very slow and the workers can be incompetent and rude. Then again, a drive thru at a barbecue joint is a very stupid idea. It's not like burgers or tacos which can be prepared ahead of time or quickly. If you're going to use the drive thru, be wary, bring a book for you'll be there for the longest time and they'll still probably get it wrong. Calling ahead of time won't help either for you'll still have to wait.
If you have a taste for barbecue, I would not recommend this restaurant. I would highly recommend spending your own money and time to making it yourself. At least that way, you can play with flavors and get the meat exactly the way you want it.