Snagged a dining voucher that looked like a steal. Payment was easy and the code arrived instantly, but the restaurant barely answered the phone and their inbox bounced once. I used Groupon chat to nudge things along and finally got a table midweek. Food was fine, savings real, but the back and forth was annoying. When I asked to cancel, they offered credit instead of my card. It works if you are patient and read the terms, just not friction free.