The ability to track all of our projects from proposal through implementation and even ongoing support. We have been able to use Sqbx for over 10 years now and it has never disappointed. They are always willing to help when you need assistance. The only thing I can think of is that they should allow more customization with their templates. For example, we would like to be able to create custom fields but cannot do so. That's not really a big deal though since the system does provide many options for creating your own templates. We've used Sqbx for all of our project management needs. It allows us to track budgets, resources, change requests and more. It also helps us with tracking and managing our invoices.