First, the good points: It's got lovely artwork. 1980's fan favourite (and the man entrusted with the late 80's reboot of the Superman mythos) John Byrne inked over by long-time Alan Davis collaborator Mark Farmer, famed for his 'clean' style. It looks great.
The story is good as well - an opportunity to parody the S** and the rest of the British tabloid press, with Colin (Superman) Clark's newspaper editor boss clearly modelled on a certain fictional Torquay hotelier. There are some lovely twists on the long-familiar Superman stories, including some lovely cartoony moments (how does a teenage Clark stop himself from looking in the girls' changing rooms with X Ray vision?; what if young Clark switched on heat vision whilst looking at a 'hot' girl? etc) Indeed, Clark's parents are more caricatures than 'real' people to keep in with the 'just for laughs' style.
Where I have an issue is with the use of John Cleese as a co-author of the book. I suspect that he's had very little to do with this. True, there are numerous in-jokes hidden away for the fans covering both Python and Fawlty Towers, but would Cleese really have allowed a conversation between Clark and his earthly dad to have allowed the use of the term 'sidewalk' instead of 'pavement'? (Just how British is the writing team?) This has all the hallmarks of one of those Chris Claremont X-Men stories where Britain consists of the Houses of Parliament, Beefeaters, and little else. Austin Powers would feel at home here.
Overall, disposable fun, but I'm glad I borrowed this from the library - it's written as much with one eye on pandering to the preconceptions of the US market as it is on giving us Brits 'our own' Superman story. For a quality alternative in a non-comedy vein, I'd recommend Batman: The Scottish Connection by the all-Scots team of Grant & Quitely. They'd even included Rosslyn Chapel years before the Da Vinci code got there...