Ok I'll bite. I have been thru Killeen and tried it several times. It was good to me. Thin patty of meat with lots of pepper seasoning. Toasted buns. I heard that the mgr/owner Billy is not there anymore. He went to Belton and opened B-Town Burgers. Why don't you try it and report back.
We eat b-town every Tuesday after soccer practice. Not my soccer practice, my 4 year olds. But that's not the point. He loves b-town, haven't been to billy bobs in about 3 years. Saw they opened another location off Stan schluter.
Best burger place in the area is Lois and Jerry's in Bartlett. By far. Open only in weekdays, I think. Worth the 20 minute drive from Temple. They have awesome nachos, too.