The album was unpopular upon release, but has gained a cult following in part due to the mysterious disappearance of Sullivan.

While it is commonly known as U.F.O., a 1970 pressing on Century City Records titled the album simply as Jim Sullivan.

The artist enlisted session musician ensemble The Wrecking Crew to help fill out the songs, and it was recorded and released later that year.

James Allen of AllMusic called the album a "lost classic" and praised the atmospheric and orchestral feel of Jimmy Bond's string arrangements.

[14] The Independent wrote that the album has its moments of "hippy excess" but that much of the material is full with David Axelrod-esque string arrangements and features an essence similar to that of "Wichita Lineman"[15] All tracks are written by Jim SullivanAdapted from LP liner notes of the 2010 Light in the Attic reissue.