We bought a Select Comfort bed with a 6 month deferred interest offer. If you pay on or before the 6 month period, then there's no interest. The creditor for Select Comfort is GE Money Bank. We sent them payment in full two weeks before the due date (the due date was 4/13/7 and we sent it on 4/1/7) - also, the mailing address was in the same state! Shouldn't be a problem - right? Well, GE said they received payment on 4/19/07. A GE representative told me "there's nothing we can do". The interest rate is nearly 25%. What a SCAM... just say "we didn't receive payment on time" and you're good to make 25%.
If you ever "sign up" for this type of deal, protect your self. Pay a month before the due date or send the check certified mail.