Tony Roma's isn't an amazing place. You'll find much better rib joints around. It's just a typical chain with typical chain food and chain food decor and service. Nothing offensive, but nothing great either.
The thing that kicks Tony Roma's over the 3-star line are the freakin' onion loaves. Literal, giant loaves of lightly breaded and fried sweet onions that you can then dredge in your choice of sauce. I like my stuff sweet, so I go for the Carolina Honeys and it's awesome, but they have other tangier choices available.
One thing that our pals from down south or out east should know: This ain't bbq like you're used to. This is thick, sweet sauce bbq.