I've been saving this thing since I got the card almost a year ago... haven't had any use for it while I was in Asia and since I'm about to embark on another journey to the South Pacific am unlikely to use it again. Tried to trade it for something else on FT, but the identical Hertz certificates I was offered for it were kind of useless also. So question is, when would it actually make sense to use this highly restricted $50 certificate? Its advertised that its good towards any UA or UA express round-trip flight within the US, Canada or PR/Virgin Islands. Must be booked by the end of this year for travel through the end of next year. BUT all the fares I searched say from NYC-South Florida were cheaper without the voucher than with it, whenever the voucher actually showed up, which wasn't that frequent for my travel dates. A bit frustrating.