The ability to have all project information in one place! I can see everything about my projects at once - which saves loads of time. It also makes sending invoices very quick and simple. Some things could be improved - like being able to view more than just the last few days' worth of activity. Also would love if you were able to create sub-projects within larger ones (but this may not always be possible). If you want Project Management done well then do what we've done and make sure you look after your clients by giving them detailed reports of their projects progress.