I would definitely recommend this book if you are looking for atmosphere rather than fast-paced action. Not that it doesn't have a plot - it start with an in-your-face suicide scene, for example - but that's not what makes it stand out.
Alan Warner never writes about what Morvern feels, only what she does. Weirdly enough, this matter-of-fact style only underlines the lyricism of his imagery: drunken nights in a Scottish marina, stacking shelves in the supermarket, raving in Spain - all of these rather banal things take on a poetry of their own.
The sleeve of the book called Morvern amoral - that wasn't my impression at all. She just makes the best of things. Her best friend and her lover both let her down in different ways, but the cool thing about Morvern is that she never gets weepy or obsessive about what life throws at her. I call that brave, not amoral. It seems as though the author fell in love with his own main character whilst writing, which would have been bad news if she hadn't been intriguing enough to do make the reader do the same. She is, so that's OK.
According to other reviews on this page, the book is very authentic - it certainly felt that way to me. A guy writing from a girls' perspective is bound to get the wrong end of the stick sometimes, though (I think some other girl picked up on this as well!), and I have admit that did happen to Alan Warner as well. Especially the lesbian action seemed more of a fantasy than a reality - but no worries, it sort of fitted with the dreamlike atmosphere of the whole book.
Tender and harsh at the same time, this book sticks with ya.