Although Dennis De Young's concept about man being replaced by robots in the near future failed to get off the ground, Kilroy Was Here still harbored two of the band's best singles. "Don't Let It End" almost captures the same endearing qualities as their number one hit, "Babe," did four years earlier, peaking at number six, and the synthesized novelty of "Mr. Roboto" went all the way to number three, accompanied by a lively and rather extravagant Dennis De Young at the helm. It was the song's mechanically spoken chorus and slight disco beat that made it Styx's fifth Top Ten single up to that point, overshadowing the rest of the album's tracks. Pretentious, weakly composed, and rhythmically anemic, songs like "Cold War," "Heavy Metal Poisoning," and "Double Life" couldn't even keep the album's main idea interesting, solidifying the fact that Styx's forte was singles, not conceptual pieces. The saxophone playing from Steve Eison gathers some redemption, cropping up here and there, but even some decent guitar work from Shaw and Young can't save the rest of the album. Brought back to life in the late '90s in an automobile commercial, "Mr. Roboto" gained somewhat of a minor resurgence more than 15 years after its chart life.