I remember receiving about 8 vols. of these all at once and for about 3 months I used to listen to them in my bed at night.
As well as shed loads of prev. uncomped pop-psych, I loved the fact that they would also sometimes surprise with offerings of Soul, Glam Rock & Shirley Bassey!
Not all of it was always to my taste but I had a lot of fun with them. Some of the material has since popped up on comps on Particles etc but most of the best tunes on Pop Cycles still remain exclusive to the series.
Enjoy!