After the tour, the Experience had given Wyatt access to their recording studios after hours, and he recorded these demos there. Some of the tracks were later reworked and used on several Soft Machine and Matching Mole albums.
Writing at AllMusic, Thom Jurek said Cuneiform Records has "delivered a Holy Grail" with this album, considering that some of the recordings were believed lost, or not to have been made at all. He said that the cleaning and remastering has produced an "excellent" sound, and he described the compilation as "All killer, no filler".
In a review in PopMatters, Maria Schurr called '68 "especially edifying to Soft Machine die-hards", and a "great ... lost musical treasure".Rolling Stone called the album "By far one of the year’s best releases".