Interesting about the new CX717. Wikipedia has articles about this one as well as the Provigil, which has been around for a while. Here is an excerpt about Provigil:
The French government
indicated that the Foreign Legion used modafinil during certain covert operations. Modafinil has reportedly been investigated by the United States military for use by its soldiers. One study on helicopter pilots suggested that 600 mg of modafinil given in three doses can be used to keep pilots alert with only 8 hours of sleep in an 88 hour period. Another study on fighter pilots showed that 300 mg modafinil given in three divided 100-mg doses sustained the flight control accuracy of sleep-deprived F-117 pilots to within about 27 percent of baseline levels.
It's unclear what the long-term effects on the brain would be from this sort of sleep deprivation, especially for people in as high-stress an environment
Again, I've not tried it, and have no plans to do so. Still, in an emergency