Costner is ranked as the No. 26 prospect in America and the No. 8 power forward in the country per TheInsiders.com.
"I just think he was very comfortable with Coach Sendek in our meetings," Seton Hall Prep coach Robert Farrell said. "I assume that he really had a good time on the weekend on his visit. Their style of play fits him beautifully. With all those things, that's the reason."
Costner, a standout with the Playaz Basketball Club, really came on during the end of the summer. Known for his ability to step outside and make shots on the perimeter, Costner by all accounts is an excellent fit for the Pack's offense.
"They run a lot of Princeton stuff," Farrell said. "Brandon can play away from the basket, he'll be perfect in the high post, he's a great passer, you lay off and he can shoot and he can post up. There's nothing that wouldn't fit him perfectly.
"When I first saw them on TV two years ago, even before I knew Brandon would consider N.C. State I figured it would be a good offense that he would fit in."
The 2005 class is shaping up to be a big one for Sendek's charges. So far N.C. State has three commitments from Top 100 players. Costner checks just outside the Top 25 and was preceded by wing J.P. Prince (No. 29).