The course at the Rosa Khutor Extreme Park has come under criticism from some athletes, as Norway's Torstein Horgmo was ruled out of the Games in the men's competition, while Shaun White withdrew from the event.
Fuller told reporters: "I think they have done an awesome job. It's probably the biggest and most exciting slopestyle course in history. I wasn't expecting something like this. It's mind-blowing, the course is extreme.
"It's probably one of the biggest courses we have ever seen. I think it's going to go down with a bang."
The qualifying round for the slopestyle gets underway later today.