Root Cause Analysis > End-to-End Anylysis
SID
Workload Analysis
By default I don't think it will display users, but if you open the Navigation you can add the user to the User filter and pull up the most accessed transactions by that user (or users) you put into the filter. After you are done you can then export it to excel.
I like this method over SUIM as you can pull up multiple users for a single transaction or vice versa and stack performance data to that.