I attempted to use my groupon bucks before the expiration date but the system inexplicably rejected my purchases repeatedly... customer service couldnt help and service escalation took days to try to resolve the problem. I asked for a guarantee that my Groupon bucks not expire while resolving the problem - best they could give was well try. Groupon bucks were not only eliminated from my account but they were taken before the expiration date. This company is unreliable and dishonest.