1. Easy to set up and really nice aesthetic layout (plenty of options to play around with)
2. Several modal window viewing options
2. No bugs so far and its still a beta version!
3. Multi-user gallery and categories with rating and voting
4. Good module support
5. Excellent CB integration with no need for a separate profile gallery
6. Good support forums with quick responses
Obviously not in the Flickr league but the closest thing to it ... and the best part is its free