When I first read this book at the ripe old age of 12/13 I thought it was probably the best book I had read in my life.
I have finally got the chance to read it again at the age of 37. I must admit time, age and experience of other books in the genre (especially over the last 10-15 years) does change the way you thought of things before.
This does not mean that I no longer liked it. I am still impressed with Moorcock's imagination, his ability to tell a highly entertaining story without waffling for ages on descriptions that dont really matter (Jordon's Wheel of Time Series comes to Mind here). In fact, he does not spend much time on descriptions of any kind... he really does get on with the story at a break kneck speed and before you know it you have completed the trilogy.
His writing style is much more in the vain of the pulp fiction writers like Edgar Rice Burroughs. In fact, in his recent new introduction to the trilogy, he not only admits that he has copied his main heroic character from Burroughs Warrior on Old Mars but also the pulp fiction style.
Unfortunately, the trilogy cannot any longer be considered a monumental feat after the massive world building, characterisation and epic story lines created by Jordon, Martin (Song of Ice...), Erikson (Malazan series), etc. However, it is a very good read