As one of the biggest GNR fans on the planet (I've seen them 10 times, own countless bootlegs, all the disks, and have met AXL!) I feel I'm a pretty good judge on what is good and what is not. I've read every book published on the band and probably 90% of the interviews they've done.
Steven's book is a good read. It gives you a great look into the madness that went along with being the drummer in one the biggest bands in the world. You definitely get the impression he was/is just a happy go lucky 15 year old for life. Some great tales are recounted in this book that I haden't heard before and his side of his departure is interesting, albeit it I wouldn't necessarily trust his perspective on the matter.
In the end you feel sorry for the guy. If given more of a chance he probably could have helped make the illusions a greater disks. Sadly, the book after he got kicked out of GNR was a bit of a bore. I got high, I messed up, I got high, I messed up... repeat. Shocking one body could endure so much damage and still be with us.
If your a gnr fan this book is a must but I wouldn't necessarily believe everything in here is the truth. 3 solid stars