A question about quickbook.com

[JandD Mom]

Hello everyone,

I am going to stay at the Residence Inn LBV North in Oct. I was checking the rates on quickbook and they are very good. The problem is I have a $100 Marriott gift certificate I want to use. Will this be impossible if I use quickbook (ie, is full payment in advance required)? Thanks!

[Lewisc]

Quickbook only charges you if the hotel requires it. I've used them twice, my credit card was used to guarantee payment but wasn't charged until I checked in. I'm assuming the certificate isn't some time of promotion that doesn't apply to discounted rates.