It's hard to believe that we released the first version of Plan Explorer almost two years ago! The acceptance it has seen by the SQL Server community during that time has been amazing, and tremendously gratifying for all of us here at SQL Sentry.
From the start we've had many requests for additional features and functionality. Many of those went directly into the free tool (for a full list go here). For others, it was obvious that some serious heavy lifting and/or an increase in the support requirements would be involved, making them not well-suited for a free tool.
Plan Explorer PRO is the result of many months of building out several of those high effort/high value features you've been asking for. Initially we've targeted the features that we believe will have the greatest impact on efficiency and information sharing. Here are the top 5 major features in PRO: