I enjoyed this much more than "Green Green Grass" - I always found Boycie and Marlene to be rather one-dimensional characters, although John Sullivan did his best to stretch them a bit...
I was always a huge fan of OFAH, though it really has been repeated ad nauseam on UK Gold / Dave or whatever it's called these days...
With Rock and Chips, though, he had much more interesting characters to work with, and the casting was superb. Clearly, there could never have been anyone else to play Freddie the Frog, and all the other actors played their roles to perfection.
Prequels don't always work - cf the abomination that was "First of the Summer Wine" - but this one really did, IMO.