Instruct: Classify the given review as either positive or negative.
Query: Unbelievably great

This little book has revolutionised my songwriting. I used to spend hours, days, months labouring over the 'right' rhyme. Now all the possibilities are available straight away. I still struggle with which one to use, but at least I don't have to write interminable lists of possible rhymes first.I like the way this book is structured (phonetically). It makes perfect sense to me and is also really useful when you're looking for that slightly 'imperfect' rhyme.