I like that it has all of my projects in one place with many different tabs to organize them by owner or date completed.
Also there are filters for each tab so you can easily find what you're looking for; this makes finding things easy when working collaboratively as well! There's nothing i dislike about builder box at this time but if they were able to add more people/projects then we would have no issues either ;). We use builder boxes primarily because its great having our plans organized together under one roof which saves us from constantly emailing back and forth regarding changes needed.