I remember this as a summer show from my tween years, during the 70s. I loved Paul Schaffer's music then- I love it now. Greg Evigan wasn't a household name yet.
I don't believe it lasted but a handful of episodes, but the concept was still cool at the time. If I am remembering correctly, the Devil's deal was for a year and then they (Paul and Greg) would lose their souls and either go to Hell or just live out their days with just the year of glory.
It was a standard sitcom, but fun and had good, solid music.moreless