I was reading the fine print about down payments to hold a date and final counts. Here is what it states on one site:
"We require final counts 2 weeks prior to your rental. Once a final count is given it cannot be changed. If you pay in full for your linens and the amount you need is less than the amount you reserved, no refunds will be given."
Somtimes it may seem like you are getting a good deal until you pay for 200 covers/sashes only end up needing 125 and you don't get any of your money back.
Just be careful read the fine print and ask the questions!