Until recently, all the ones I've seen have been boring. Nothing like a movie trailer, nothing to hook me. So I figured I'd never bother getting one made.
And then I saw Marie-Claude's. I recommend that you check it out. It's for her paranormal novel, Ancient Whispers, which also happens to be a finalist in Dorchester and Romantic Times' American Title V contest. I don't read paranormal but her trailer is incredible. I'm completely impressed. Also, on the sidebar of her website is a list of her crit partners. They have also created book trailers you might be interested in.
Anyways, the amazing thing is that she made this trailer on her computer. Free.
So now I'm working on mine.
Have you thought about creating a book trailer for your manuscript? Do you think it's an effective marketing tool?
Oh, Kristen left the first comment with a link. That was a good one too. It gave me chills.