They allow you to customize the gift certificates. Ours are good on Sunday and Tuesday through Thursday (i.e. not on Friday and Saturday) and the gratuity is added in @ 20% before the $25 deduction. Restaurant.com has several of their own stipulations as well, one certificate per table, as noted above 2 entrees with a minimum purchase of $35. And they allow only one certificate per month per restaurant. It has been a good program for us. They also offer $10 lunch certificates. Hope to see all of you soon at the Lyons' Den