Some of the features include:
- Custom list colors for favorite films, etc.
- Export lists as CSV
- Hide tags in lists
- Display large posters on lists
- Cross-reference lists
- Organize movie info tab with all lists
- Enabled owned films feature for free users
- Sort lists on progress page
- Find out how many checks you need to get into Top 25/50/100/1000/...
- Random film on lists
- Upcoming awards on progress/favorites/etc pages
- Enable watchlist tab
- Move a list to any position with a double-click
You can enable/disable/configure features via Username->iCM Enhanced.