X-Flight is a roller coaster in County Fair at Six Flags Great America. While it's not the best, it is also recommended.
Designed by Bolliger & Mabillard, X-Flight takes riders on a flight with no track above or below them. Riders sit in pairs, suspended on either side of the track with their feet dangling. The coaster hits speeds of up to 55mph through 3,000 feet of intense drops and five inversions, including a barrel roll and zero-g roll. One of the biggest features will be the near "key hole" fly through buildings.
X-Flight opened May 11, 2012.