Book Trailers, a good or bad idea?

Book trailers are a source of controversy among authors for several reason. Writers feel that it dilutes the message, takes away from imagination, and gives a biased portrayal (mostly negative) of what the novel should be. However, at the end of the day, if a trailer can promote the book and get people interested in reading, doesn't that mean it's successful? Personally I vouch for book trailers because over time I feel all forms of media will undoubtedly overlap. Take for instance, the eBook or electronic readers. Now we can read news and articles at our fingertips. If a trailer can work to stir buzz for moviegoers, why not for books too? Some food for thought.

Below, I've posted one of my favorite book trailers for Blackbirds by Chuck Wendig. Like his book cover, it is short and sweet.

What do you think about book trailers? Do you feel it's a valid form of promotion, or do you think it's ruining the art? Leave a comment and let me know! Share with friends and family!