This is very much a star vehicle for Harry H. Corbett, fresh from the success of 'Steptoe And Son'. Indeed, the 'Steptoe' associations do not end there, as the presence of Ray Galton, Alan Simpson and Duncan Wood suggest.
Like 'Steptoe', this movie is based around a traditional but dying industry (by the end of the film it has only 18 months), that of commercial narrow boat trading. The difference is that in 'Steptoe' the totting is very much a grim existence, but here it is a pretty much idyllic life and you can readily understand Hemel Pike's reluctance to give it up. The Technicolor helps provide a dream-like tone.
Galton and Simpson's script is strong, mixing comedy and drama as Corbett's 'Casanova of the canals' succumbs to the charms of the winsome daughter of the fiery Hugh Griffith. There is an equally strong cast to match, notably Eric Sykes as an incompetent amateur mariner and Miriam Karlin as a vengeful woman who discovers that she is not the only woman in Corbett's life. In my eyes Ronnie Barker steals every scene he is in.
This is possibly Corbett's best screen outing as star and is far better than its general reputation suggests. I first saw it around ten years ago and it failed to make an impression, re-watching it today, I fell in love with it.