Kudos to Newsday for yesterday's story - but the bottom line is: maybe you should consult with a lawyer before you sign:
http://www.newsday.com/long-island/many-liers-pay-for-home-improvements-only-to-learn-costly-lesson-of-buyer-beware-1.10586461
http://www.newsday.com/long-island/many-liers-pay-for-home-improvements-only-to-learn-costly-lesson-of-buyer-beware-1.10586461