She's used SuHoliday on over 8000 users. Thus far we think this is a record but we usually only hear from people when there are problems.
Also based on her experience and feedback we've added capabilities to our most recent version of the cmdlet, including:
- Not setting reminders for holidays
- Better logging
- Default time zone handling
- Memory handling improvements
- Improved resilience when Exchange throttles your insertion
We're discussing when and how to roll this out to the main cmdlet download.