When I began reading this book I was really positive about it - the sleep stuff was new and interesting to me. Soon though, the ideas about retraining your thought processes and patterns of behaviour became like exhausting demands. When I'm really deep down in depression I already feel inadequate and extremely guilty and not being able to do the stuff the book suggests only served to reinforce that.
It's like I KNOW I SHOULD be trying to get out more, do more exercise, change thought patterns etc but if I can barely lift my head off the sofa I'm not sure how to do those things!!! And now I'm beating myself up even more for failing at that too.
I've found it vital to surviving depression to let go, listen to your body, be gentle with yourself and trust that the storm will pass. If you're absolutely at rock bottom I'd recommend Gwyneth Lewis' 'Sunbathing in the Rain'.
I'm going to re-read this book when I'm through this storm as I think the ideas are valid - just inappropriate at this time as I think a certain amount of strength, emotional and physical,is needed, which is not always a resource I have in my darkest times.
I would say, however, that different things work for different people. If solution based stuff helps you through depression then go for it. But if you're someone who's brain won't quieten, who needs to simply to begin to validate feelings that you've either not allowed yourself to have or have spent years undermining then there are better books than this for you.