Since I work Downtown, I order from Thai BBQ every now and then. I would say this place is above-average as a "hole in the wall" takeout spot. There are better Thai restaurants for a sit-down meal, but for delivery or quick takeout, this is the best in the area.
I've never tried their Pad Thai, so I can't comment (weird, because that's usually my go-to dish). The Drunken Noodles are very good; this is what I normally order. I really like their spring rolls, both the meat and veggie versions. The chicken Satay was excellent too, the one time I ordered it.
I haven't ever had a bad meal from this restaurant. The quality is consistent. I haven't sampled very much of their menu, but everything I have tried has been spot on. I wouldn't recommend Thai BBQ to the Thai food elitist types out there, but it's a great little place to pick up some dinner on your way out of the ghetto.