DH and DD used one last week at the character meal place at the Swan (sorry, can't remember the restaurant name). It was no problem! That place is EXPENSIVE, though. They still spent $30 even with the $25 certificate.
I'm going to get one for Kimonos...I could spend $35 there by myself, so the $25 cert. will make it at least somewhat reasonable to have dinner there w/DH.