Back to me... My wife's four global upgrade certificates make it possible for her to upgrade two round trip flights per year. (frequentmiler.boardingarea.com)
If you tend to fly domestically, the regional upgrade certificates may be more useful to you, and you can get twice as many. (rewardexpert.com)
Despite other reports, the new version will still offer the club level upgrade certificates for paid stays. (uponarriving.com)