I'd be inclined to agree that some of the more 'positive' reviewers are just planted.
Some of the stories need to be well salted before digestion. That said, some of them are quite amusing, although not generally rip roaringly funny.
The book is going to be notorious more for what has been left out than for what has been included (and exaggerated...?) Lots of Talksport personalities excluded or brushed over, and a rather selective view of what has gone on at the station over the years.
There is a decent book somewhere waiting to be written about this radio station - perhaps one day someone will get around to doing it.
In the meantime, file this under 'mildly amusing entertainment'. Because that is ALL it is.