One of the most influential and controversial features of Parker's wine criticism is his 100-point rating system, which he popularized in conjunction with his friend Victor Morgenroth. Parker designed the system to counter what he believed to be confusing or inflated ratings by other wine writers—many of whom he accused of a conflict of interest, as they often had a financial interest in the wines they rated. The scale, now widely imitated in other publications (such as "Wine Spectator"), ranks wine on a scale from 50 to 100 points based upon the wine's color and appearance, aroma and bouquet, flavor and finish, and overall quality level or potential. Therefore, 51 rather than 100 different ratings are possible. Although some critics, such as Jancis Robinson, argue that numerical rating systems are questionable—given the subjectivity of wine tasting and the variance in scores that a wine's age and the circumstances of tasting can cause—similar 100-point scoring systems are widely used by American reviewers. Many British reviewers, such as Jancis Robinson and Clive Coates, still prefer a 20-point system.