...and you will be rewarded. Personally I agree with some of the -ve reviews given here, in that the plot can be confusing at times. However, this seems to be a trait of Clute's work, having read some of his short stories published in Interzone (among others) and, if you ignore the plot and just read, it does not detract at all from the book as a whole.
I had similar problems with plot in my younger years reading Moorcock's Cornelius books, where numerous characters would come and go in different guises, and the stories, if there were any, were non-linear. So, if you don't like the style, then you'll probably never like this book, or any of John Clute's work for that matter.
But if you just let the language, the ideas and the absurd, but ultimate rightness, in the tale wash over you, then you will be rewarded by an engrossing and fascinating, if strange, read.