Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This book works, seriously, it does!

Do the excercises, you will NOT be sorry. My fiance takes a loooooong time to climax. After two weeks of doing the first excercise, I have been able to last long enough for her to climax...not once, but twice.I can't wait wait to do the rest of the excercises!Do yourself and your woman a favor and buy this book, as it's more than worth the $9.