"It went great," Tatum told Scout.com. "I came out here made new friends, competed well and had a great time."
"It's the best experience you can have being apart of USA Basketball," he added. "All of these guys are the best of the best. You get to come out here and play and against these guys and see how you match up."
And Tatum matched up quite well. One of the top performers of the weekend, Tatum, a 6-foot-7 wing, showed a much improved mid-range game, made play after play in transition and displayed a higher release on his jump shot.
"I think I got better as each practice went on and got used to the altitude and getting used to playing with these guys," he added. "I think I did extremely well the last practice."
"My mid-range and post game is what I've been working on a lot lately," he added.
Known as an elite level recruit in the 2016 class, colleges are already making Tatum, a standout at St. Louis (Mo.) Chaminade College Prep, a priority.
Thus far Tom Crean, Billy Donovan, Roy Williams, Frank Haith and John Groce have stopped by his high school.
"Open gym and seeing all those coaches come in is pretty fun," Tatum said.
Tatum said he has a couple of visits planned for the near future. He'll be at Kentucky for their Big Blue Madness the weekend of October 18th. The Wildcats offered him during the spring.
"Their interest has been very well," he said about Kentucky. "I talk to coach Cal frequently just to check up on him. He's a great guy."
Frank Haith and Missouri have made Tatum a priority and he intends to stop by their campus to see a football game in the near future.
"They came on the first day of open gym when they could come out," Tatum said. "They came to almost every AAU game and they were the first school to offer me in the eighth grade."
"It means a lot," he said about Missouri being the first school to offer. "They were the first to notice me and take that chance on me to give me a scholarship offer."
North Carolina is one of the many schools that have turned up their attention with Tatum as well.
"The interest is pretty high," he said. "They came to as many AAU games as they could. I love talking to Roy Williams. When he came to open gym my eyes got real big seeing him so it's been great."
Tatum, Scout.com's No. 4 ranked recruit in 2016, also said he plans to visit Ohio State for a football game in the near future.