Originally Posted by sumorai
I've used both. From a user's standpoint, I don't have any preference. Both have saved me money and are effectively the same thing.
I don't have a brand preference either. However, I have been burned a few times where the promotional value expired before I got to use it. At this point, I rarely buy unless it's something I'm almost certain to use, like a voucher for a restaurant that I've been to.