Perhaps it's just me, but I use Crystal a TON for custom reports.  I find it a huge pain that the table and code are concatenated into one key field, because then I have to create a Command rather than selecting and joining the tables in the wizard.  It would be SUPER helpful if the current keys could be split up to simplify custom reports.  Not to mention that all the string manipulation is TERRIBLY sloooooooooooow, and you have to manually add which fields you want from the tables to the query.